Rishabh Pant is one of those X-factor players that can make a big impact on games and he's proven it. In fact out of Kishan, Pant and Samson, Pant has proven his potential the most on the international stage. That too, he's still young and he's only going to get better the more games he plays. He's played some pretty good knocks of late too, a 56 coming in at 42/3 vs WI and that 100 against SA a month ago which gave something India to defend in that deciding Test. Doesn't make any sense to propose a change in wicketkeeper if he's being consistent as of late. Unless his form severely dips in the next six months or so, he should be the No 1 wicketkeeper for India.
Kishan and Samson have been in that pool of inconsistency too, Samson for years went ham at the beginning of an IPL to taper off two matches in, barring that consistent IPL last season. Kishan was bang average last IPL. At best currently, they should be the limited overs backups. Their current form doesn't warrant a promotion to being the first choice keeper.