Warps do exist and they are widely used, but they are prone to being deleted or set to another location by griefers and trolls. There should be a plugin that allows players to create warps, (maybe a limited amount) but only be able to modify/delete their own. This could function alongside with Guild Warps, a feature still in development.
Because there is a PlotSquared bug where aliases sometimes randomly reset and stop working, this can be very useful on plots.
The command could be /pwarp or /playerwarp to differentiate it from the ESS Warps system.