I disagree. Adding a player counter to hosted phases will help people find RP a lot more.
Imagine typing ".ph o" and seeing beside each of these phases, the current amount of players in them. You'd straight away know which phase is the most and least active without needing to join each individual phase to then check, run around, /who, scan for RP or track humanoids to get a remote idea of how active the phase is.
The argument I heard against this is that one or two phases will just dominate then, because people attract people. I'd say that's not really a bad thing, as the current state of RP has lots of empty phases cluttering the search, and the most active among those rarely see more than 10 players.