How can I ask Larian? Is there some mechanism to get in touch with them for non serious issues?

I'm guessing there's some parameter in the code like you say which influences whether each skill gets boosted by primary attributes. One theory is that AoE skills do not receive the bonus since the two we found were Battering Ram and Whirlwind. I'd have to look at others to form a more thorough opinion, but to some degree it doesn't really matter!

Thank you for all your patience. It's not often that people are willing to offer real criticism as you did (that may be unnecessary, those skills aren't actually underpowered, etc) and I appreciate that you spoke up. I'm modifying things a bit like Scales did -- I've dug into those Skilldata files and am reducing the damage of several Master-level skills and I've slightly buffed enemy HP and movement/initiative to enhance the challenge!