Naval isnt actually that bad, at least in cruisers+. Because you are usually spending a notable chunk of time in one vehicle, so the RP gains are reasonably consistant.
Coastal though, I imagine sucks, probably worse than ground
Imo I’d change the current system slightly.
Change the rp breakpoints from 50% > 75% > 100% (free)
To 25% (new!) > 50% > 75% > 100% (free)
And every breakpoint you hit you get .5 skill up to the maximum of 2 bars.
Example; say a tank/aircraft/vessel needs 100k to get ace crew.
With the current system, you would see no benefit in vehicle capability til the 100k RP where you’d get Ace for free.
Under this revision, you would see a minor, yet notable increase at every breakpoint at 25k, 50k, 75k and 100k.
This way, it doesn’t feel like such a slog to - for example - grind 1 mill+ rp
The GE cost could also get a new discount (at the new 25% breakpoint) and would follow the current system.
Yeah, that would be a good addition too.