"Deliberate, tactical, TURNBASED or VATS. XCOM influenced." FOR SURE.
There is no other option, if the game wants be an RPG first an foremost. Going any other direction is just diluting that in various degrees.
I do not want simulationist realism (ARMA), I do not want twitch shooting (Doom etc), I do not want diluted halfsies that still work like a shooter (Mass Effect). I want stats to make an actual difference in how things work; accuracy, recoil, hit chances (both player and AI)...
It is doable. In various ways. And not even trying is to not making anything different than what the market already offers with the plethora of shooters and action games. It'd be lame. It'd be boring. It'd not be memorable. And the audience will notice it, if the audience was RPG'ers. It'd not be anything different from what GTA does, or what Watch Dogs does, or what Far Cry does, or what Bethesda does today... the list goes on and on, everybody makes it the same thing and wants to appear as different, but absolutely nobody is in the end. They're all the same. There's nothing interesting in straight forward shooter gameplay. Nothing. Everybody's experienced it before in multitude of games, and will in a multitude of games to come. There is no creativity in it, nor in spicing that shit up with a few abhorrent slow-mo tricks and gimmicks that everybody else does already either. It is lazy design-wise. It is but an easy cash grab with no soul what-so-ever of its own. That's what it is, and it'll only drown the whole feature in the ocean of others who have done it better.
So, there.