Eh there's no way around it.
Unlike SWTOR, the devs didn't give us Good, Bad, and Indifferent choices.
It looks like a Sandbox (and it is), it seems like an RPG (and it is), but the main story is as linear as a Batman game...
V is V, there's no other options. No good V, no bad V, no indifferent V.
Sure you can play LTL weapons.. Sure you can play KillemAll. But it doesn't matter, all that does is change the voice actors scripts post mission.
It's not like Fable where if you're bad the town folk and NPCs literally run from you and cower in a corner and beg "please no". It's not like Fable where if you're good every male and female NPC in the game compliments you and has a big heart over their head signaling fuck me and marry me hero!
Nor does your appearance change like both Fable and SWTOR does based on actions.
Main Story = Linear Batman Game... V is Batman.