Just getting to this.FWIW, Im going to be sorely tempted to limit 'X per long rest = to proficiency bonus' abilities (which now seem to be the norm) to no more than once per encounter.
Possibly allowing a PC to expect inspiration to do it a second time in the same encounter.
That to me seems to be a good way to curb nova then rest 5MWD shennanigans.
The main reason why WOTC moved to Proficiency Mod per long rest is to let character nova on short adventure days.
Instead of "1/short rest and you should have 2 short rests to let you get 3 uses per long.", It's "you have 3 uses per long rest. Use them in half your fights in a 6 encounter day or 3 times in your 1 encounter day."