Favorites Wheel. The new power wheel for 12 powers.

Knowing me I'll probably restart several dozen times or so because I'm not happy with whats in my favorites or how I put my skill points before I am completely happy

There will be more.  You will unlock abilities the higher up you rank your Profiles.  This was confirmed with a passive during the CES gameplay.  Also some notables missing are Warp, Stasis, and Reave.  I wouldn't be shocked if lash, smash, and and dark channel made an appearance.  I also think that some abilities will be earned, secret, and loyalty rewards.

Another thing worth mentioning is the shield/barrier protection. In the gameplay videos, we see that Ryder appears to be able to use both of them (the blue and purple bar).
I assume we'll have some control over it, and they will each offer a different kind of protection.

I don't know if we're talking about the same thing. I'm referring to the protection bar. I'm not sure if we'll upgrade/choose them in the power screen.

Shield:


Barrier:

Ok going off what 'soon'jockey said I think it will be his "A"or "B" or my "C" for an explanation of how this could be done better than going into the actual menu in inventory.

A) Another control opens the favorites wheel directly ( i believe this to be the most likely. Hitting the "x" would cause the radial wheel to flip like a coin. One side is weapons/ammo the other is favorite load outs.)

The d-pad turns into a selector for favorites while the Radial is open. (This is probably the most efficient possible system and least fanciest. This is the one I want it to be.)

C) Using the left stick keeps it as weapons and selecting with the right stick would cause a ghost fade like transition to favorites. (this would look the coolest and have the benefit of making people go cross eyed. It is also the worst option, don't use it Bioware. I'm just a crackpot.)

Another thing worth mentioning is the shield/barrier semi circular bar. In the gameplay videos, we see that Ryder appears to be able to use both of them (the blue and purple).
I assume we'll have some control over it, and they will offer different kinds of protection.

Yes, it will be interesting how this is handled.  It might be profile specific but then your shielding could change when in combat.  There might be a shield mod slot and the type (tech or biotic) would gain benefits from your passive.  Let's say your biotic passives give you increased biotic powers.  That power could transfer to your biotic shields.  So you would want to pick the type of shield you are most specialized into.  I know it won't be tied to the mobility option because I have seen biotic blink used with an energy (blue) shield.  Hell maybe there is a yellow armor option for the combat class that functions completely different than shields like how "armor" worked in DA:I.  That is just me going wildly off the rails though.

Yellow like tech power or like Sentinel?

I'm concerned about their use though. Will be limited, won't it?
A max number of shots until we run off special ammo.