...I've actually found that being evil is extremely prevalent, there are a lot of opportunities to go "the bad route," and my companions have commented on it with some serious concern on multiple occasions. I've actually been almost certain that two of them were going to leave because I was just being wayyy too malicious and murderous.
I guess that's a testament to the depth of the game that we've had such different experiences.
I mean there are some reactions to stuff you do inside of cutscenes but as soon as you do evil shit outside of that there's pretty much zero response to it, no comments or anything, other than mostly the narrative still follows the "default script" so to speak, which is still basically just agreeable hero yes-man.
I don't know if it's a testament to depth, I see it more as still missing something

The problem is that Evil isn't even implemented in the game yet, right now you're kinda forced to go the Good way.
Lots of things still need to be added and changed, even for the first Act.
Also, I think another thing is that people who don't witness you killing people, won't know you did.
I don't know if I want people who didn't witness me doing something knowing, but I definitely want the people actually witnessing it to react to it. For example, when I rescued Lae'zel I killed the two Tieflings there in cold blood (from the scripted dialogue prompt even) and even then she made absolutely zero mention of it, just did the exact same lines as if you convinced to leave or release her. That's a bit lacking I think
Edit: I mean, Shadowheart hates Lae'zel vocally if you let het her join the team, so when I murder her gruesomely she should at least have a comment about it. Just an example