Evasion is already extremely powerful in the basegame, to the point that a skilled player can make lights impossible for the A.I. to even damage, let alone destory. That is not just my opinion, but I have an entire recorded series where I take 4 lights into 4+ skull missions and walk away not only undamaged but with the opfor dead in impressively short amounts of (real) time.
I feel like HBS is getting the wrong feedback and advice, especially from the very small multiplayer community who have views that don't reflect the realities of the basegame. I.E. that you can customise and maximize the talents of your pilots, that you can fit +defense gyros, you have lostech, etc.
Modders improving evasion is an issue of not understanding the power of evasion when you stack it, how to move and take turns in such a way to mitigate sensor locks and that you can sprint 3 mechs and fire with only 1 and that can still be a great turn. They are under the impression you need to fire all the time and thus leave mechs exposed and vunerable, which is fine when they have tons of armour but is not how lights are defensively managed.
Changes to improve evasion, will led to gameplay with no challenge once you have that "Lights on" (pardon the pun) moment and fully understand their playstyle. However, very few make that effort, falling very quickly into the "bigger is better" trap without actually exploring making lights work.
Lights and evasion being bad is the biggest misconception in HBS battletech. Once you hit the correct build, have the right pilots and understand the movement logic to keep your tokens at 5 or more, you are basically an unstoppable god. If the A.I. even lands a single shot, it is bad luck.