This is BIG inconvenience for ppl who play on scheduled times ... lets say before going to school/work and after.
So if i start my upgrade at 8 in the morning, i would expect it to finish it at 8:00 am after 3 days only. If it finishes at 10 am, then my builder is zz'ing for about 10-12 hrs till i come back. In that case i am 'forced' (Voluntarily) to use gems, which is not a good thing in first place.
For active player perhaps it is only a minor inconvenience. But not for all.
Perhaps it might also be a big inconvenience for active players too if the the upgrade finishes in 18 days instead of 14.
More importantly i think this is not a complex bug to fix. So why have it ?

