Talk is of a 23 team premier league now this keeping the same amount that usually get promoted.Not saying I like the idea of promotions but no relegation, but I do need to correct your scenario above.
If 2 sides get promoted from League 1 and 3 sides are promoted into League 1 from League 2, it puts the number in League 1 back to 24, not 25. Remember we only had 23 this season?
Then one team up from the National League would give:-
22, 24, 24, 22.
I guess the good thing is people are now looking to see what options there are, the aim as I understand is to finish PL and Championship if at all possibly and end L1 and L2