I think it is. It’s a good testing ground for rules and makes scouting certain players a bit easier, because there is more film of them. But I think this league would benefit from being a bit more low level but in exchange having more teams.
Part of the success of the BattleHawks is the resentment towards the NFL leaving. You can't go 30 minutes at a game without a "Kroenke Sucks" chant. The NFL will never return to St Louis, especially after we sued the league and reached a billion dollar settlement. Assuming stadiums issues can be addressed, other former NFL markets are ideal UFL expansion candidates: Oakland & San Diego.