Sending its MLS Next Pro teams instead. This is done but was brought upon by the new Leagues Cup meaning there's simply too many games.
If you ask me, I think the Leagues Cup needs to drop the Group Stage and just do a 6 round single game elimination tournament. Like Wed-Sat-Wed-Sat-Wed-Sat done. 6 games in 17-18 days for 2 of the teams. Once the field is whitted to a Round of 16, have MLS (and Liga MX) resume with the eliminated teams. But keep playing in the FA Cup. Send your bench players and MLS Next Pro players for the 1st few rounds but have your best available for the quarters, semis, and finals.
If you ask me, I think the Leagues Cup needs to drop the Group Stage and just do a 6 round single game elimination tournament. Like Wed-Sat-Wed-Sat-Wed-Sat done. 6 games in 17-18 days for 2 of the teams. Once the field is whitted to a Round of 16, have MLS (and Liga MX) resume with the eliminated teams. But keep playing in the FA Cup. Send your bench players and MLS Next Pro players for the 1st few rounds but have your best available for the quarters, semis, and finals.