Now Mass Effect 2 & 3 are backwards compatible on the Xbox One....

I highly doubt mods would work.. It's just against EA policy in general (not old Bioware though). Plus, ME3 needs to do serious workaround to make them even work..messing with the root folder, indexing "TOC" files.

I only have one of the discs for ME3, so I know I can install the whole game, but I assume I could only play half since I am assuming you would still need to switch discs when it prompts you?

For you mods statement that is a decision Bethesda made for Fallout 4, Skyrim and probably future games. I would assume for mods on any Bioware game, EA would have to approve it (not 100% sure). I think the mods are only on the remaster version of Skyrim, so even if they could I doubt they would do ME mods, unless they remastered the trilogy.

I have never done this, but I found two guides that might be what you are looking for, not 100% sure though.

https://www.reddit.com/r/masseffect/comments/48jydu/worst_possible_run/
https://www.reddit.com/r/masseffect/comments/vsmr8/kill_your_friends_project_death_count/

Exy. Thanks for the advice.

I only kept the one disc became years ago that other one was left in a 360 that was sent out to be fixed. Tried to trade in the game to gamestop but they would not take it with one disc. Just kept it since to have, but might consider that option if I wanted to play ME3 again and it was cheaper to get EA Access then re-buy ME3 with both discs. 

I only needed Disk 1 to install each game.

I appear to have 'lost' my additional multiplayer characters, not sure what's happened there...

I was thinking that too, maybe if someone gets the a disc swapping point in the game they can comment on if they had to do that or not. 

will we be able to digitally buy ME2 and ME3 (and all their DLCs) without the need for either EA Access or having the disc based versions of the games?

Thanks. Really hoping they will become available as a separate digital buy as well.

The tweet by Major Nelson certainly gives me hope it's possible, as he differentiates between Backcompat and EA access
/photo/1

Might have to go old school disc based for the Trillogy then.

My original Xbox One flamed out last week, lucky my black friday replacement One S had a free EA Access trial, so I decided to start playing ME2 and ME3 as those can't be bought digitally yet on Xbox One, it's either DISC (which I don't have, since I switched over from PS3) or EA Access.

I bought all Story DLCs for ME2 (my favorite game) and ME3 (the later, which I never played any of them before).

couple of things:
Just got to the new Normandy introduction, so far it seems the loading screens/animation pass much faster.
Maybe it's switching film grain off, but the image seems a bit clearer than I remember from PS3.
Also noticed a new dialogue question and line from Miranda (which I'm pretty sure isn't on the PS version at all)

so far, so good