Most people come on to the forum to complain, but the beta is awesome. I know the gameplay is subjective, but I enjoy it immensely, and I hate playing CoD etc.
Issue List:
#1: Yoshi-Jump
#2: Skill ranking when losing. I think it should be mitigated by good performance.
#3: Nade splash. Could be reduced a little.
Great beta, enjoyable multiplayer experience, good job 343.