2) Domestic Cup competition becomes fiercer
Although the teams playing the ‘Super League’ would no longer be members of their domestic leagues, such as the Premier League, they would still compete in domestic cup competitions, such as the FA Cup. There’d still be plenty of time for this.
When the ‘Super League’ clubs do return to face smaller clubs in their own country in such competitions, they wouldd ultimately be more eager to win in order to prove their worth in their own backyard and that they deserve to be in the elite league.
On the flip side, there would be even more merit in beating the bigger clubs because they belong to the ‘Super League’ and this would become a greater incentive for smaller clubs to up their game in domestic cup competition.