1. Yes, but for other reasons. I enjoyed Other M's game mechanics, sans the "first person missile" thing, everything else felt like a smooth transition of the 2D feel into 3D environs. Third person is definitely the way to go.
2. No, sorta. The maze is integral to what makes Metroid. The artificial doors I can agree with, maybe open-world caves, but caves for the most part, with only a few open areas like Super's Crateria or the Landing Site in Metroid Prime (only, of course, larger).
3. Agree. Whether you love, hate, or simply don't care about Other M, it did nothing for the story aside from providing background for Metroid Fusion (which is nice for those who hate it because its canon-status really does no lasting damage, aside from making parts of Fusion into an Idiot Plot by proxy). It's time to move forward.
4. Yeah, once that rubicon's been crossed, there's no real going back anyway.
5. Your idea is pretty good there, have AI Adam narrate them.
6. Yes. The GFS Valhalla especially did a great job of this.
7. Maybe one colony on the planet in question? As a landing site and a place you can bring back strange artifacts for analysis or something. Could take it or leave it.
8. Solid writing talent, or if Sakamoto insists on running the show again, more editorial control to smack him down when he goes off-script (Sakamoto does great work, but only when he's under editorial constraint, like the low-budget Tomodachi Collection)
9. No. Hunters was mediocre at best, that direction is not warranted.
10. Disagree. It would be very difficult to implement properly.
Monster Hunter: pissing me off since 2010.