"create and host their own servers or games with specific rule-sets as well."I have a feeling this may be to do with PVP matchs etc and would be like how old FPS worked. This is all speculative but it could be like wanting to play 2 vs 2 DM or maybe 16 vs 16 vs 16 CTF.
A interesting feature for sure and another idea about breaking the mold set by the MMO giants.
I'll post more when I find more details.