Needlesplit
Anyone who feels they may not be able to do that successfully or have 'finger trouble' maybe shouldnt be up there. Compared to some of the other stuff we need to do correctly, a subscale change is a fairly minor 'procedure'
I Understand your comment and yes I can set and check a subscale setting but the point I am making is that if you don't need to then why bother ?
Get rid of unnecessary tasks and boil it down to required essentials which will lead to more efficient and safer flying with less room for human error
If you think that humans are infallible have another look at the accident reports. My point is that we do make mistakes occasionally so anything that reduces the likelihood has got to be good
And yes I know that it is possible to screw up the maths but it is maths that a 5 year old could do