I dont quite agree with a set floor. The floor needs to be a range. Maybe that floor could be tied to a 2 season MLB team minors ranking. Top 10 gets a 20mil range. 11-20 gets 10 mil. Bottom 10 gets no range. Brewers with all of these young prospect entering the AA-ML level, why must they pay a FA they dont require when the depth chart is 2-4 deep at any time Pre-Arb players?
As to cap, until you come up with some fix on deferrals counting toward that season's team payrolls and not counting towards it, there isnt a fix.
Make it 50/50. 50pct of the player's deferral is counted that or each season. When the deferral amount year happens, 50pct of that amount isnt counted towards the team payroll that season.
So for example, in Ohtani's case, vs 10/700 being valued by MLB with his deferrals as 10/460 counting on payroll.
It would be 10/350 and 35m counting vs the team payroll.