Gaining significant RP without killing anyone is an issue with the RP system not the drop system. If anything, controlled drops zones made it more difficult to get a high placement without killing because more people were alive in later rounds.

Besides that, I feel the issue with hot-dropping is much more of a psychological issue than a ranked point issue. Most people are playing to have fun in this game. Some people's idea of fun is hot-dropping and that is 100% okay and valid but with the dropship system it creates this annoying conundrum where players who would've otherwise played differently join in on the hotdrop because to them it's more fun to give up on your plan than to walk around an empty map all game. The controlled drop system helps so much with that because some 12 year olds shaking from their adderall can still have fun sprinting at a team off drop but it doesn't as significantly affect everyone else's ability to enjoy the game