The idea that MLS had rigid requirements was never really true anyway, and both NYCFC and Inter Miami are very unique situations. Really, all bids are unique and are evaluated holistically. Ultimately, it's almost surely better for MLS to have teams in both spots with both ownership groups involved, but in non-ideal stadium situations, than not having them at all.
Also, the Miami group still owns the Overtown site, they just de-prioritized it. I'm not sure if they'd return to it or not, but its still there. I think they'll be more than happy to sit on it a few years and continue to try to force through Freedom Park for a while. They have public support.