Okay, So I have some opinions on ARURF
It's taken me a few cycles of ARURF to come to a conclusion: Both the AR and URF parts need some changes. Badly. This is the fan-favorite mode, so one should think these changes not too insane to ask for.
1st: Make it actually random. I know this sounds like random complaining, but in the last 6 matches of ARURF i have played, i have encountered the same few champions with little variation from match to match. Every once in a while, you might see a wild Poppy or galio, but it's always the same "URF meta" picks. Can it actually be random? i'd like to actually roll skarner, yorick, MF, or lee sin more than once every 50 urf matches.
2nd:make passives/Item passives also get reduced cooldowns. Many champions rely upon passives with cooldowns to function well, so why hasn't that transitioned to urf? This forces active-heavy builds that encourage Keyboard mashing. Sure, not all of them necessarily NEED it, for example, the sheen items already have a very short CD that, if reduced, would cause a whole host of new problems, but reducing banshee's veil and Maw of malmortius would fix the super poke-heavy fights and errant fizz instabursts on a whole team. Furthermore, because of no reduced champion passives, Champions like aatrox and zac get left by the wayside. Like said previously, this may need a bit of tweaking. Singed's new passive might be a bit... Poisonous...
3rd:Maybe introduce 3-5 bans for each team anyways? Some champions are outright not fun to play against. No one has fun playing against eve, Sona, soraka, or Karthus, but it still happens because the random champion algorithm favors it.
Please, these are changes that could fix a lot of problems, or at least shake things up enough that new champions might start being good instead. Maybe if this picks up enough traction someone important might look at it.
Maybe re-introduce the Specific champion nerfs from previous URFs to balance affairs out if things get too out of hand.