Remember the “Nerf everything” (or something like this) topic? 
Nerf, especially one-sided, won’t change much - it may make game harder, but the game won’t be any more tactical as it isn’t very tactical in core mechanics in a first place. We would need a revamp of few core mechanic, something we both know won’t happen. And if it would even be an option to have such changes, we would have them over year(s) ago, not after 3 DLCs. Game is and will remain balanced around skill metagame, not tactical approach (unless modded, but we have to wait for development to end to even consider such invasive mod to be even remotely stable and maintainable).
Edit: Found few relevant topics (I may or may not stand by my ideas there, the topics are outdated and my ideas were wishes for a different game) to remind you, as we have been discussing it more than once already: