Keep the game like halo 2, and i will be happy.
Modding = BIG NO NO, it will go too far....
Dedicated Servers = Pricy.
No Microsoft = No Sales = No Halo
Seperate Playlists per gametype = No, will be a waste, keep it as it is now.
Join in progress = Big No No.
you obviously were disappointed with reach, which i guess is understandable, but overall, IMO anyway, it was pretty good, and people are getting used to it.
However, this is just your OPINION, for all you know, the majority of the halo community may not like half of this.
so, if you don't buy halo 4 because you didn't get the stuff you wanted, it wouldn't surprise me.