I'll probably live with the 165s for now, but how short are folks going these days. Also how much shorter do you need to go to make much difference in having pedal strikes?

FWIW, I am decent at reading the surface and keeping the pedal rotation such that I don't get strikes over a lot of the terrain I ride, but we have a ton of roots here with short climbs that are all requiring pedaling the whole way up. I am getting pretty good at managing on the routes that I ride all the time so maybe I am learning.

Perhaps it is kind of like toe overlap on the road bike. A problem until you learn to subconsciously avoid it and then you don't see how it was ever a problem.