[Paria]

with the introduction of

Added "nextlevel" server cvar. If set to a valid map name, server will change to that map during the next changelevel

Are there any plans to add this function directly to sourcemod? would be nice to be able to select from maps.ini directly or something via the admin menu.

[BAILOPAN]

SourceMod has that functionality builtin already. There is no admin menu option to set the next map (though there is an open feature request for that).