I am not sure if convertible RP have any use for anybody.
From my pov those “special” RPs were simply created to target players which see this as an unused resource and do not like wasting something. So they are created to lure players into real money investments - not more, not less.
I read several posts in the last years about convertible RPs - the usual outcome was always that the conversion rate is way too bad to think about investing real money…
It’s the same strategy like in every other f2p game, i recommend to ignore such things in general…
Do you plan to trade the cost of rostering a tank and putting the crew on expert? Because it’s quite expensive to roster a new tank, but above all it’s extremely expensive to put crews on expert.
all of this already has been adressed and the changes are very good, if you still go largely into negative, sorry but that is skill issue
Edit: Besides i just checked you are only at tier 4, those tiers never realy had any nig silver problems to begin with, it only was a real problem in the high tiers