I am currently encountering a bug with this plugin where survivors joining mid-game may occasionally spawn at the starting safe room instead of at a survivor. They then often have to run a long distance to catch up to the rest of the team. I have yet to find a way to reproduce this bug consistently.
ABM did not have this issue, with that plugin survivors connecting mid-game always have their bot spawned on an existing survivor without fail. (Perhaps you can examine its source code?)
Other than this issue, the plugin seems to work very well! This seems to be the only major issue I've encountered, if it can be fixed it can be a great alternative to Multislots or ABM.