USA need a unified whole nation league as the top division at least if they dont want promotion relegation, but with promotion relegation in 20 years this country will product top national team
https://en.wikipedia.org/wiki/Indonesian_football_league_system
This is my country football pyramid, our country basically enormous in size almost the same like USA
Our top division 18 clubs 3 relegation (no groups)
2nd division 20 clubs 3 promotion 3 relegation (2 groups , 10 each) > like MLS > part top MLS (10+10)as new whole nation league and low MLS as 2nd division
3rd division 24 clubs 3 promotion 6 relegation (4 groups , 6 each) > can be from USL, top USL clubs enter 2nd division to fulfill quotas, USL lower, USL1 , USL 2
4th division 64 clubs 6 promotion> amateur league ( club from province /state for USA) > lower USL 2, USL 3
The longest straight-line distance from west to east on the US mainland (contiguous 48 states) is
2,892 miles (4,654 km)
The longest north-to-south distance on the U.S. mainland (the contiguous 48 states) is approximately
1,650 miles (2,660 kilometers)
Indonesia spans approximately from west to east
5,370 kilometers (3,200 to 3,300 miles)
The longest distance from north to south in Indonesia is approximately
2,210 kilometers (1,373 miles)
* the data is vice versa cause we use metric but you guys use imperial lol
From west to east we even farther than USA 4654 km vs 5370 km, right now the club in our top division the farthest is Medan to Biak literally from far west to far east, there are no direct flight (if there is direct flight it will be around 6hours). So usually the schedule are set to be like a tour for this far away club, like 3 matches away for clubs in the areas , so from A to B to C to D, then back home. But the most important thing is each club play each other once home once away. So we know who the best club in the nation fully. I think nowadays AI can help to make this schedule easily to maximize this , maybe to get lower flight time or to lower flight cost. So club from west can go to mid > near east > far east > mid> home. 4 away matches straight
I think USA can become top nation like top 10 if they implement this (whole nation top league) and promotion relegation, basically more pro clubs, more youth developments more talent being produce. I think in terms of talent my country can have great talent players, but usually they dont have discipline in terms of nutrition, lifestyle , work etic, etc
USA can do 20 (top) ,30(2nd, 2 groups 15 each) and so on. I think minimal is 3 tier, the more tier of profesional club is better
If MLS can not merge with USL , then USL should take over and compete with MLS, add USL Premier above USL Championship as whole nation league in the future, as they already have USL championship, USL league 1 , league 2
*I checked wikipedia , they already planned USL premier in 2028 with 12 clubs as top division in the same level with MLS. If they apply promotion relegation this will be great. They should add top league member year by year until 18-20 clubs by more promotion less relegation. Then the same number for both until the number of clubs reached. And hopefully USL League 2 can be professional in the future
https://en.wikipedia.org/wiki/United_States_soccer_league_system#Men's_league_structure