Aram suggestion
I think players should be able to set their runes based on the enemy teamcomp. The last 10 seconds (or so) of "choose ur settings" could be a period when champions are already locked in but you can see the other teamcomp and have some seconds to set your runes properly.
The randomness of Aram is about to get champions randomly not set runes randomly. It is about how can you utilize your champion's power in different teamcomps. Even if your teamcomp is handicapped you can take it as a challenge and try your best. Imo runes are not part of the needed randomness. Some champions (usually the safest and OP ones) don't have to care about the enemy teamcomp because they set their runes in the same way every time. However, the less played, more difficult champions, a.k.a. champions without range attacks and dashes are already handicapped enough. When I play a "hard" champion without reroll, dodge, etc. then I don't want further punishment for playing it (e.g. I set my runes against hard cc and AP damage and the enemy team is full AD.)