That's going too far. Carpet would produce ace-fests, which almost nobody wants. Although a couple of 250s or even 1 500 would be fine IMO, but not a 1000.
4th clay 1000? No thanks.
As for indoor hard, didn't you hear? The trend pushed by Djokovic is to marginalize indoor tennis (make it optional, put WTF right after the US Open). The next step will probably be switching WTF to outdoor hc. Djokovic/Murray is the future, so we all know who the ATP will listen to. It would be bad business no to cater to the current top payers. Who cares about being fair (providing varied conditions) to lower ranked players. Who cares about Fed, who is declining and will retire in a couple of years at most.
So you're proposing to make the sport cater to only the top 2 players?