i LIKE the variety and creativity of other game modes. The IDEA behind NvN is very interesting, however I think it needs further development [if the goal is both teams are the same, cool. keep them the same; so then map design and layout needs to be overhauled to match that teams playstyle =)]
And other modes like CTF, deathmatch, survival etc. are awesome! However with the current player base and coder/developer base, I think it is best to remain disciplined and focus on core game play development.