I mean, sure, you can 'specialize', but they better either make the class bonuses damn enticing, or allow you to re-spec that 'focus' as well when you re-spec.
Either way, it's a broadening of the 'be able to do EVERYTHING' mentality, and one I don't know if I particularly care for.
But granted, will have to wait to see it in action (both in gunplay and if there are any narrative beats associated therein) to get a more solid judgement.
So are planets sorta like the zones in DA: Inquisition?
IIRC we don't know for sure, but it's probably somewhere between DA:I and the first ME.