Battlefield Uncertainty: Combat applies -5/disadvantage to Passive scores

OK. I've simplified it to 2 basic rule changes, plus 2 changes that apply to martial classes only.

(1) During combat, if you take the Search action or bonus action on your turn, for a Perception check, whatever you roll+modifiers results in, that result becomes your passive perception score until the start of your next turn. 

(2) During combat,  if you do NOT take the Search action on your turn, your Passive Perception is 10+modifiers with a -5/disadvantage penalty for Battlefield Uncertainty until the start of your next turn. (note: this disadvantage cancels any advantage from things like Sentinel Shield to your passive perception score)

(3) Barbarians, Fighters, Monks, Rangers, Rogues: at level 5, these classes can Search as a Bonus Action. (i.e. to avoid the Battlefield Uncertainty penalty, use bonus action to Search)

(4) Barbarians, Fighters, Monks, Rangers, Rogues: at level 10 these classes do not suffer the Battlefield Uncertainty penalty (no -5/disadvantage). (i.e. Sentinel Shield advantage is no longer canceled by battlefield uncertainty disadvantage, so Sentinel Shield applies +5(advantage) to passive perception).

Having spent a lifetime training in the art of war, martial classes are eventually able to overcome the Battlefield Uncertainty penalty.

Note: All active rolls for perception, etc, are unaffected by Battlefield Uncertainty. 
Note: outside combat, all perception checks (passive and active) are unaffected by Battlefield Uncertainty

I'd say concentration on a spell is a flat -5 (not disadvantage, just -5) penalty to perception (both active and passive), but that's another conversation