First I'll say thank you for the map. I love ARAM and love that you guys are supporting it. I can go either way on the passive XP, starting at level 3, etc. Not really too attached either way.
I do dislike the 20% healing reduction though. As most games are all random, and you can't control who you get, having a hero like Mundo or a healer can really suck with that healing reduction just for being on the map. I'd really like an option set where you can turn that off (and turn off the little bonus heals in the lane too).
I just wanted to give you my personal opinion on feedback both positive and negative. Again, thank you for the map, love the way you guys give us something like this.