first thing needed to fix is guns damage...
they should be just above KM, seriously, a 12.9 inch gun making more damage than a 16'?
i don't have a problem with tinny hitbox, it's ok, but angle should be taked from 25 to 30 or 35... this guns are just too fast to be fair against angle 45 from Iowa or Yammy
taking pounding capability should also be nerfed, let's say to something like IJN stats...
then, with those 3 "doable" changes you get a small and fast ship, with low (but not as low to avoid the need of using AP against AW BB) angle but not such a good damage and not such an iron jaw.
then RM playstyle should be going in and outside range hitting enemy BBs, but with the real risk of getting pwned by an Iowa or Yammy Blockshot and doing little damage to UK A-whore BB, while having a disadvantage against KM BB, who will be able to do some damage to u. It will be similar to MN in some aspects but with "small hitbox" advantage and "damage" disadvantage