Suggestion: Reroll restriction in ARAM

Hi!

I play a lot of ARAM and I know ARAM is generally not prioritized when it comes to anything at all, really. As it should be. But I have a suggestion: When rerolling, could it be so that you do NOT get a champ that one of your teammates just rolled away? It is really frustrating to e.g. get that Nunu on the team, someone rolls him away, just to see someone else roll, just to get Nunu back... And in this example, nobody wants Nunu, nobody tried to change with the original Nunu player, etc. It is especially frustrating since you could just have swapped with the original Nunu, and have saved a reroll.

Real example that got me to finally write this post: My girlfriend got Kalista, who she did not want, so she rerolled. I got Kayle (for, like, the fifth time today, what is up with that?), which I was totally bored of, because of the reason in the parenthesis, so I rerolled and got Kalista. Now, I could just have swapped with my girlfriend to get Kalista without a roll, so I obviously did not want that. Really frustrating.

Also, why not make it so that you don't get the same champ twice in a row? To avoid aforementioned getting bored of Kayle, for example. Actually, it should be like... if you get one champ, you can't get it again for 5 games or something like that.

Thank you for your time!