Both Sambhabana & Keerti have left, so their pay cheques can easily be accommodated for Manit by PH whose fee may still be less than Shabir. Feel that way casting budgets won't change much in RM.
But gradually Shabir's screen time may be reduced as Mohan, and more screen time given to Manit's character with some buy-in from viewers.
Regarding makeup, c'mon leap promo started with R applying makeup & lipstick, it means that obsession for heavy makeup for R will continue, but yeah costumes can't be grand with heavy work blouses & jewels post leap.