I hope they're going about this in an iterative fashion because just ripping out all weapon quirks and done seems bad. I'm hoping they're rolling with something like:
Iteration 1: add sensors, remove weapon quirks and see how the various weapon
Iteration 2: tweak sensors, look at/tweak ECM, tweak weapon numbers globally for clan v IS balance
Iteration 3: slight global weapon tweaks, add in slight weapon quirks for severe under-performers
Iteration 4: more slight tweaks to sensors, mech weapon quirks, etc.
THEN maybe full release.
TL;DR: I hope they're building balance from the ground up taking all aspects into account. We'll see...