Are you playing Platinum ?

I've played a few platinum matches, and have really lucked out with great pugs.  Only one failed to extract, and we wiped on a W6 upload.

I've been taking my TSol w/ incendiary ammo and extra shields.  I tried disruptor once - and I know that some units have awfully heavy shields, but it always feels like armor is the bigger issue.  I carry a Shadow (along with the Revenant), but rarely have any opportunity to use it - there are just too many enemies targeting me to dare poke my head out of cover to scope, even for a moment.

This is because most of my teammates have been cloakers, or carried the benefit of someone else's stealth grid.  I've been the recipient of most (if not all) of the aggro dumping performed by my teammates.  Not an especially fun role to play, but a necessary one, and they've been pretty patient about rezzing me frequently.

RNG has recently given me several new Siphon weapons, including a Revenant and (I think) a Shadow.  I'll take them next time, and here's hoping they'll help me survive longer.  Also, if I'm going to be tanking for cloakers, I'll probably re-spec with that goal in mind.

I would also very much like to know the composition of the various factions for Platinum.  I've been caught in Observer crossfire, with nowhere to run - and would really like to avoid that in the future.

I sense the love in here.

He's just salty because I've had to school him a few times. He probably thinks I'll stop posting, but I'll still be here just in case he steps out of line again.

I got worthless XI & XII Salarian Operative cards. Vet ranks do almost nothing for him.
Also got a Krogan Gladiator XI and Kineticist XI.
The worst though...Black Widow Siphon and Black Widow Bulwark (I don't snipe)

I wouldn't mind the bloat, if they only dropped once ALL other UR were max.
This just sucks as my other unwanted UR approach X, you have to hope you don't get them or it further waters down what you actually want
hello pathetic Hurricane III (my lowest UR other than new Kishock)
I am just praying I get my Rozerad to X (currently VIII) before anything else (4 other guns at VIII).
please RNG please...

Plat is alright, some objectives on some maps in some places kill you outright. But otherwise not so bad.

Outlaw is all Krogan, all day, every day. All sorts of armor, but few shields, so anti armor characters, especially stun resistant ones stomp them. They are also very vulnerable to slows, debuffs, and damage over time effects from fire. The only issue is that fire and ice are mutually exclusive.

Remnant is all about shields, only a relative few armored enemies, so anti shield characters, and disruptor ammo destroys them easily. Any kit with disruptor ammo can smash through the whole game easily, detonations are icing on top.

Kett is a mixed bag, they have a lot of big armored units, but their infantry composition is shield heavy, so they don't lend themselves to a particular strategy. Everything is alright, but nothing is really GOOD.

Maintaining is damn near impossible.  Your only bet is using flak cannons on enough enemies within range just to activate it.

Gladiator won't be able to pull too many enemies to her.  And you'll need to strip shields on the ones you can pull.
Krogineer isn't the best melee Krogan to begin with, so she is out of the question.
Kroguard can attack smaller enemies, but the amount of damage you take out in the open isn't great for him.  Plus once you get through all the mooks, you have Blaze Hydras, Ascendants & Progenitors as the last enemies left.

That leaves the KroMerc and maintaining rage in the later rounds is only probable with flak cannons

With regards to the OP's question.

I don't know. Just played a few platinum the very first day.

Basically platinum came roughly four weeks too late for me cause one month ago I started already getting bored but I continued for another two to three weeks but without being able to put my heart and soul in it anymore.
Platinum (for me) can't turn that around really anymore and the infinite card grind put me over the edge.

Too much energy/time invested, it was time to put on the emergency brake.

Maybe again after some time...

My average gold runs are around 14 mins (with decent Pugs, guess I'm not quite the badass yet!), and my Platinum ones (when everything goes right, and with decent Pugs) are between 16 and 22 mins, depending on team, certain objectives, etc. (*edit*). 

In my book credits per time are better with Platinum. Even if the match fails on wave 6 (because of Hack), then it's still 75K creds.

But if you can do Gold runs in 6 minutes, then good for you I guess  .

I do agree that the enemy loadout needs a bit of 'finetuning' to get it right. And I agree something needs to be done about the Hack objective. 

Not much. Beat it a bit just to show I can do it but that's enough. It doesn't pay well for how long it can take and how much faster gold games are now. And I really don't find it fun. It's probably easier than ME3 Platinum but I don't like playing infiltrators, which leaves me limited to the classes that can take the aggro dump. I'd rather play gold where more kinds of strategies are useful, but that's becoming so easy (due to veteran boosts + weapon variants) that it's not much fun anymore either.

They really screwed up on this patch, and it looks like they plan to discontinue support and leave the game this way. Not good.

I am still hopeful for a SP DLC and then more kits from that.

I don't think we are done yet. I think we will still get that Quarian Ark SP DLC.
Then, we will get Quarian, Drell and others in MP.

I think we get one more MP DLC dump.

Also, I wonder what happened to the Roekkar faction?