Droning does wonders to figure what traps are where(can even see the lesions a bit better). Also just think of where traps can be and just read players and their possible choices. For example, frost on the enemy team but never saw where the three bear traps are? Drone to check? No drone? Okay then every vaultable action technically could have a frost trap, which is easily dealt with(like shooting down as you jump).
I don't feel like the trap meta is one that is super OP. Sure it's annoying, but you have to think of the opportunity cost since you have to give up someone who could be useful to bring kapkan or whomever.
Lesion? The longer the time hes alive the more lesions to expect. And most people will put them in obj doorways(fire to check if it makes sense). Kapkan? Check where he goes during prep, drone your optimal routes for them wherever....all that aside just assume there are some on obj doors.
ASIDE all that, this is why thatcher is signifcantly more relevant(before he would be traded off for twitch or whomever else). As of now I personally don't feel some big imbalance(ela nerf, kapkan buff, etc) and part of what gets me playing is exactly that and the fact that theres a solution to a lot of situations the new ops present. Mira is still arguebly the most impactful to the meta(before BB but he got nerfed crazy).
Unfortunately I had to stop playing as much. Needing to play other games and real world obligations had me delay this ranked season(also because castle, montag, caveria glitch) but I still managed to meet my goals and make diamond and comfortably so.
Can't sink more time in it currently(1000+hrs), the game will ultimately last me many more years though...