Iowa Fan:
I like the direction you are going with your six suggestions. I like most of them. However if your first one was implemented, you would not probably have to worry about your third one because I think that would hold back quite a few entries in itself. As a parent, I'm not too likely to drive 60 to 120 minutes to a tournament and pay a $10-$12 entry fee, if my son or daughter has the possibitlity of only wrestling once. So you would automatically hold down entries with no double elimination. You would also cut down matches so much that none of the others would probably be necessary either.
I do like your other suggestions though. The only thing about the last one on not allowing wrestlers who do not make weight to change their weight class is that I could see some tournaments start to allow more wrestlers who are a pound or two over the weight to wrestle anyway. If any tournaments currently allow a pound or two, they might bump that up to three to five pound allowance. Anyway I'm not sure how many tournaments bump a wrestler up a weight class if they don't make weight. Evidently some do.
The two day format could be run like the split format suggestion with 6, 8, and 10 & unders on the first day and 12 & 14 & unders on the second. I believe most coaches would prefer to have the tournament completed in one day even if it is a longer day. It gives them either a free weekend day or allows them to go to a novice tournament on Sunday, so that is why I think the split format on the same day would be preferable.