There is many daily riding situations where I hit speeds below 5mph, and possibly navigating around objects/people/cars/dead cats at those slow speeds which gives toe overlap. Not everyone rides their bike fast enough constantly to avoid it, and it doesnt mean they ride too slow or are looking at their bike or some nonsense.

I guess my point is that toe overlap will happen, but it will rarely cause you to do anything more than just notice it and maybe make your heart jump a little.

Get 165mm cranks, and try a size smaller cage. I went from MKS size L to MKS size medium with no discomfort (actually they feel better) and it cut my toe overlap down by a decent chunk.