I am wondering if it is a bit of a faff to go from 175mm to 172.5 mm cranks
It's certainly more trouble than it's worth unless you are certain that 175 is too long for you.
I have only ever ridden 172.5 on a road bike, not sure what difference the longer cranks would make, if any.
Having switched between 172.5 and 165 cranks on different bikes for years without ever really noticing any discernible difference, I’d try the 175s first before making a decision to swap.
@michaelgscott started
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It's certainly more trouble than it's worth unless you are certain that 175 is too long for you.