That is one of the valid options, but I would think it would better
if
the server owner did that tweak, than an nfs-utils update, no?
I'm not suggesting that you do an update that just tweaks config files in
%post or anything like that. I'm suggesting you make the out-of-the-box
behavior with configs people use today do something useful. Claiming to
support v4 is not useful if it doesn't really work.