I just went from 140mm to 160mm and offset from 51mm to 46 on a giant this evening, only tried it at the driveway fell pretty good. Going to the trail Sunday to a proper test
I've gone from a 51mm to a 42mm offset Lyrik. I find the bigger offset understeers much easier and feels almost nervous. I much prefer the added stability of the lower offset and find I can put more weight on the front end without it folding so gain confidence entering corners fast with the front loaded. The steering with the lower offset takes slightly more effort to turn but I much prefer it.
I went from 150mm 51mm offset FOX 36 performance fork to a 160mm 44mm offset FOX Factory fork, running 27.5 wheels, rides so much better, much sharper turn in, quicker to change direction, no downsides for me