I think the server side just needs to kick the players that dont run EVO and stop the players that evo ban getting in. Then the server owners just need to run it as thay were. all so have a 3 min time delay for the kick so new players can see what thay have been kicked for
if a serverhoster would do that then u can be sure his server will be empty very and dead very soon...
i think it will never happen to have a full buissy server with ACP only, then nova must connect with evo and all players need to use it to start the game...
but u can use it as cheathunt and tool if u know how :-)