For the servers I manage, the users I grant sudo access to usually need full root privileges. On occasion when someone has needed root to access certain commands or to make certain changes, the set policy is to speak to someone who has the access. But that's just me and the setup I have chosen.
If there is a way to give more granular sudo access it would and extremely beneficial feature for those who have a large installation where some form of delegation is required for for practical reasons.
I am unsure of how easy or not it is to develop something for this and @stephdl is quite correct in that you don't want to have this feature breaking the sudoers file as it could either give everyone too much permissions (thereby potentially causing sensitive data leakage or worse) or restrict everyone's permissions causing a scenario where a re-installation is required.