It seems like an even more convoluted and confusing system to me (but maybe that's in design).
Like you, I have so many questions....
Does the floor value change every year depending upon which of the promoted teams has the lowest value squad? Because this simply isn't workable, it's akin to how we were stitched up by UEFA's goalpost moving. Or do teams who, despite winning the championship, have their entry to the Prem. barred because their team value doesn't meet the floor? Because that won't be accepted by any team outside of those already in the Premier League.
Neither of those situations really work for a sport with promotion/relegation as far as I can see.