Suggesting lowering rp and sl cost for ground vehicles in WT

we have seen the new rp and SL cost for planes that are rank 6 and higher, which tbh made a huge difference, the lowerin of the cost of rp and SL made me groind faster, and i guess that is because of the new rank 9, i guess why not do that with ground vehicles too, ik that maybe gaijin is working on it rn, but tell me what do u think?

because we didnt get a new rank of tanks