Now we know what makes Ryder... special, and we know why Archon is the bad guy (Unmarked spoilers)

Shepard was and it was one of the biggest criticism for Shepard's character. Ryder could have escape that trope, hell he/she is set up to be a becoming a hero story not being one already. Yet, it looks like Bioware just can't help itself to not rehash it's own same plot structures.

I have low expectations and I'm already getting disappointed with story department.

Maybe the credit goes to SAM, he/it is compatible with that tech. He looks like (3 min ND video) a geth with the reaper upgrades, maybe papaRyder dabbled in some forbidden sciences. And since the Remnants used (are?) these robotic squid things they could 'recognize' SAM as one of their own. Although that would imply some kind of reaper involvement in the andromeda too and I'm not sure if I want any of that baggage in this new galaxy.

Nah, instant chosen one is fine. Everything is just a reused idea at this point. If the execution is good then I'll be okay with it.

True, then again, they did screw up more and more often since ME3... the original dark energy plot wasn't mind blowing either, but at least it was somewhat original and - more importantly - it made more sense for the rest of the series... down to the friggin title!

I just hope, whatever they do, they at least stick to it and tell it well...

I also thought it might be that SAM, possibly permanently fused with our protagonist's brain, is the "special" aspect of Ryder, and because of its compatibility with Remnant tech.  

Sounds like Halo

I don't mind it but I hope there's a lot more to it.

Unless all humans can interact with Remnant technology, otherwise, if only Ryder, then yes, that sucks.

Here we go again. Gain authority by being special instead of actually earning it.

To be fair, Shepard was about to become a spectre anyway, not because they came in contact with a prothean beacon. The visions were only the way to understand what you were up against, it wasn't the reason why you became the leader of everyone later on. That was earned.

Ryder becoming pathfinder just because he/she can interact with Remnant technology (if that is indeed what happens) is horrible.
Same thing I felt with the Inquisitor.

PS: Of course later on, you end up earning your title, but the problem, for me at least, is the way you acquire it in the first place.

As I said.

As for Shepard, it wasn't mentioned or implied anywhere that he/she was the only one that could interact with the beacons, or the only one apt to hunt Saren because of it, in fact, both Feros and Noveria you had previous reports of Saren and associates having business there, Virmire you had a report from STG, and they needed Liara to interpret the visions to go to Ilos later.

The fact that Shepard was "special", as all of our protagonists end up becoming, is for badassery, not just because of some power you acquire earlier (although that may or may not help later, extending your natural abilities). That's why they were charged for hunting Saren.

Imagine if Conrad Verner acquired the prothean visions instead, Shepard would merely interpret them from him and be the hero of the story anyway.

That is my point.
With ME2, you are resurrected because you killed a Reaper and bested the top spectre the Council had. Again, badassery, not specifically a special power acquired that made you more. Shepard is the only one that can stop the Reapers because of their skill and leadership abilities, that put fear in billion years old machines.

As the Illusive Man states: "You're unique. Not just in ability or what you experienced, but in what you represent. You stood for humanity at a key moment. You're more than a soldier, you're a symbol. And I don't know if the Reapers understand fear, but you killed one, they have to respect that."

On the underlined part:
Then you're going against the lore, because characters specifically mention this several times on ME2 and ME3 that Shepard was resurrected, for it. How don't your accomplishments justify resurrecting you? 
Hell, I just quoted what the Illusive Man says to him/her the moment you meet him when you ask why he brought you back!

On the bold part:
And yes, I'm saying exactly what you're stating, the ability to influence people to follow them is part of their own badassery, not an alien power or vision.   
They are special, unique, because they are skilled (and that means much more than fighting ability), it's just not some supernatural power.