I don't quite see the relation this has to Role Actions, other than the notion of a selection scheme. The closer analogue is the PvP traits.

Clearly SE is strongly opposed to anything resembling talents, for reasons we've all heard. If they ever do though, I'd agree with Sylvain that they wouldn't just position it as an open-ended pick 3-of-10 list of some sort, or a tree or anything like that.

Limiting it to a series of choices between two or three options would be easier to balance, it'd be more controlled so that SE wouldn't need to worry about how bad the worst case selections are, and it'd be more plausible to make every option relevant.

Considering how wary they are about the whole thing, I'd expect a this-or-that setup to be way more likely for these reasons. And really, they'd probably only do it if they felt so pressed for new endgame rewards that they needed to add a whole separate progression system besides tomes/gear.