More IP and Mastery for those who play Dominion, ARAM, and even Twisted Treeline, please.
I've never had a game last more than 30 (maybe 35 minutes) in any other game mode other than Summoner's Rift. It even states how long a usual match is in the game mode: Dominion = 15 to 20 minutes Twisted Treeline = 20 - 25 minutes ARAM = (really 15 -) 20 - 30 minutes
The IP we get is related to how long we've played the game (also if we won or not). This means less IP for those who play these matches.
The reason people like ARAM over Summer's Rift is pretty spread out, but my reason is that I play out of my comfort zone. I play someone I would never play.
ex. 
I like how you are forced into a fight. You have little to no where to run. And best of all, there's less harassment, less trolling, meaning more fun.
The same goes for Dominion and Twisted Treeline.
I remember my first time in TT. I was so confused. There were two lanes... a jungle... and a giant spider (sorry, Vilemaw). I liked it none the less. Even if it had the same objective as SR, it felt different none the less. It was a 3 on 3. It was harder for ganks to happen unless you brought the whole team there. It was crazy, and still is. The updates only made it better, at least that's what I think. Although the buffs on the two... thingys are nerfed, I still like it because its awesome. I hope it later gets a VU like SR to allow a more visual look into the Shadow Isles.
I love Dominion. Now that the Institute of War is gone... uh, I actually want to know where it is. Is it in Piltover? That would be a AWESOME update. The best thing about Dominion, killing someone isn't the main objective here. Your main objective is get more of the domain than the opponents. Rushing around the map. Occasionally hitting a minion.
There are things I wish they'd fix or just do to it to make it crazier: They should buff the damage on the turrets. They usually only damage me about 5 times out of the whole game. Maybe make them still damage while being taken. It might make it harder. I have to say that the minions on this mode are more even than that of SR. But, even if I (my team) gets the tower, I don't see minions (tons of them) going to get the next tower. How about they group around the turret if unusable, and attack the enemies that come near. The Summoner Spell for this mode isn't really impactful. Why not game break this spell by making it re-add +1(x lvl) points to your score. The CD can either stay the same or be enlarged. And lastly, give buffs from each place taken (depending on what it is).