Thank you both for the feedback. I've realized that 2.1.0, even if it's closer to what I want, strayed too far from the original creator's vision, and might have alienated those who are happy with the mod as is. In 2.1.2, the hard requirement for HelicopterRevival has been replaced with a soft dependency, and the rebalanced plane stats have been locked behind an option that is disabled by default.
I initially decided to make HelicopterRevival a hard requirement not because I reskinned anything in the mod, but because I enjoyed the contrast between helicopters and aircraft, and I wanted to modify aircraft to give them a different feel from helicopters, mainly by disabling tank controls in aircraft. I also have long been annoyed by the tiny fuel consumption and massive cargo capacities of this mod's aircraft, and I decided to manipulate plane stats to make them more realistic in my view. All of these changes are now disabled by default.
Carbon fiber aircraft, the other main addition of 2.1, are still enabled by default, and I hope you enjoy them.
I appreciate both of you for telling me your issues with my changes. I'll do more to avoid forcing my playstyle onto this mod's users in the future.