In team fights , it is hard to focus spells on a champion because they can stand in each other.
You should make them solid (or whatever the word is) so they go around each other (like in DotA) instead of going right through... Please think about this...

You mean to have champions of the same team be able to collide with each other, like how they already are with minions. I hadn't actually noticed that it WASN'T like that, but it all makes sense now. This would definitely help out in fights and further benefit teamwork, but I feel like AoE abilities would be affected.

It could be problematic, but it is annoying how everyone seems to hind inside each other when I'm trying to heal/shield.

Exactly... It is harder to hit and to focus spells on them...+ if your fighting in the brush.... -.-

thats why chogath is an awesome tank - everyone's hiding in his model!

No this would make the game silly, big fat champions can block small passages or even block own teammates. Just hover your mouse and smartcast you cannot miss your target. Also bunching together is really silly. What? wait for morgana to stun all 5 of you?

It is really annoying for say a lvl 1 fight were the team that is stacked has a pretty big advantage.