We've never allowed the use of point_servercommands in the past, and we don't plan on changing that.
We will allow the use of point_servercommands, but we prohibit most of the things that you can do with it. As long as whatever it does is something that automatically resets itself to default, you can use it.
In other words, if its a variable that a sever might have set to something other than the default value, don't mess with it. mp_restartround is an example of something that you can modify, since it isn't a setting.