Not sure Ifully understand wha the problem with deals is

You know the payouts when you start a tourney - the BIG 1st place prize draws the people and boosts the pot ........... so if your a player who dosen't deal then if your chip leader with 5 left and go out in 5th thats your choice. If your a more conservative player and a deal is offered you get your flatter payout structure ........if no deal is offered you can try and broke one but failing that you knew at the start what you would get based on your finish.
The only problem is that it takes the pressure out of the situation and causes an anti climax to what can be a long tourney - I have never done a deal where there is not money left on the table for the winner that is not worth playing for - hence you still get some game at the end but everyone get a nice slice of the pie