Larry: NOT speaking for the TDA, but strictly as a personal opinion, I don't think the TDA should get into the event payoff area. There are enough problems with just the "Rules of the Game". Unfortunately, I was not able to attend the recent concluded TDA Summit so I don't know if this topic was discussed.
There are many different reasons for having events structured as they are. US Events are all over the place, mostly dependent (in my opinion) on house preferences, player preferences, geographical preferences and on and on and on.
In fact, I doubt very much if any attempt to "standardize" event payouts would be successful. Part of the reason I say this is that I had an opportunity recently to play a tournament at a poker room in a mid-west USA casino/dog track. This particular room has a tournament rule that a player who exposes his/her hole cards, regardless of intent, has a dead hand PERIOD. This is in direct opposition to TDA Rule 42. When I later talked to the card room manager, he told me this rule was to stop collusion and would continue to be enforced as is.
In my experience, Las Vegas Event Structures are intended to achieve a balance between player desires, house needs (aka, PROFIT), local competition and so forth.
So, while it would be nice to have everyone using the same pay structure, I just don't think it would be practical and I don't see the TDA getting into this area unless there is at least a 90% acceptance of TDA members. Again, this is my personal opinion and should not in any way be construed as coming from the TDA.