Set it up as a permanent mode.
Then make all champions available for regular ARAM.
Now theres a mode for people who want to choose their champs, and a random ARAM mode.
Then this opens up RGM for more diversity.
Everyone wins.
Sakuri Ono1 votesRGM will have more diversity once they are done programming extra modes for the new client. I don't know the specific details, but they have stated in the past that the move from old client to new client requires some under-the-hood tuning to make RGMs functional.
That is why the first ones have cycled so often and the new ones are slowly trickling in.
They'll get it done. You'll just have to give them plenty of time since I believe it is a fairly low-priority task. So it's being done one chip at a time.
Look at it this way, at least you'll see your favorite mode again before 
gets a new skin.
That's a plus right~? [slayer-jinx-wink]
fuffychan1 votesSorry, but you are extremely naive. Riot has had the time to literally create 3 brand new modes from the ground up (blood moon, the thresh one, and nexus siege) so there is absolutely no excuse for giving us Ascension and Poro King for about the 20th time when URF, One for All, and Nemesis Draft are available but they refuse to give them to us.
Sakuri Ono1 votesSorry, but you are extremely naive. Riot has had the time to literally create 3 brand new modes from the ground up (blood moon, the thresh one, and nexus siege) so there is absolutely no excuse for giving us Ascension and Poro King for about the 20th time when URF, One for All, and Nemesis Draft are available but they refuse to give them to us.
Those new modes occupy the same creation time-space that would otherwise be devoted towards porting over the older ones. ^_^ Additionally I have seen remarks from Riot commenting on the general 'unpopularity' of certain modes. They cited Definitely Not Dominion as one, but I suspect Nemesis (for all the fun it is) may be one of those as well.
Likely what is happening there is Riot is more keen on focusing those resources on crafting newer maps to make something relatively 'URF-level' popular rather than burning time on the 'DND-level' maps.
You'll get your wish eventually. :3