So after running a few games of DnD...
Since there's apparently some confusion, I'm talking about Definitely not Dominion, today's rotating queue mode.
I'm getting the impression that it might be a bit too snowbally. Consider dialing back the champion kill gold/xp a bit next time around.
Also, I would like to strongly suggest that the Storm Alter be moved to the middle of the bottom lane. Keen an alter at mid, however. Have it ding the enemy Nexus for some health and grant a temporary speed buff upon capture. That would keep the primary objectives in the same general area while the secondary objectives would be shifted toward the bottom of the map. The secondary objectives should be a means for the team that's behind to dislodge the winning team up top.