Switch
I'm not sure if the trade is a good idea but 888 sems like a lot of fork for a switch. A guy in my old club rides a Switch with a single crown as a trail bike and can still ride the bigger stuff. With the 170mm 66 Rocky lists the geometry as head angle 67, seat angle 72. Go to a 150mm fork and it would be pretty close to 68/73 which are pretty good all round numbers.
I'm not sure if the trade is a good idea but 888 sems like a lot of fork for a switch. A guy in my old club rides a Switch with a single crown as a trail bike and can still ride the bigger stuff. With the 170mm 66 Rocky lists the geometry as head angle 67, seat angle 72. Go to a 150mm fork and it would be pretty close to 68/73 which are pretty good all round numbers.