I was playing at nascar channel and the game mode changed after the program changed...
Some new players joined and from the chat it seems some were frustrated they can't play, due rounds mode.
My humble advice would be to add simple rules reminding window from the channel server controller...
Let me write how I think it might work:
I think perhaps joining channels could be as spectator, so they don't go to play straight away, instead the channels server controller can then show a window with gamemode rules as reminder (for example the description rules text from gamemode), even better would be to have some nice animated display, like chase has. Ofc joining to play should be easy after seeing the rules: join to play button and quit channel buttons might be nice thing to have as well. I think the rules should be shown everytime person joins channel server. I think this could ease the frustration of newcomers, since gamemodes differs quite alot

Thanks,
Reaby