I agree that they should give more options for matchmaking and try to put players of similar levels together for games. However, I don't think the loadouts are ever unbalanced. The support upgrade and tactical package are pretty minor augmentations, and you have the DMR from the get-go, which trumps basically everything at a reasonable distance.
Don't get me wrong, I would love to see a playlist with no loadouts and regular weapon spawns. 343i has plenty of time to add things like that and update the game. Don't forget this is only the sixth day it's been out.