I believe If Southall stayed at their current groundshare, Burnham, they would have been in danger of being moved in to the Hellenic.
For the majority of teams 4 cups isnt that much. Division, county, challenge and fa cup/ vase or both.
Divisional is normally 3 matches. County cups is more of probably, a lot of teams in these leagues do well. Most go out of the fa cup quite early. The Vase is always a good and quite a few teams do well.
These cups shouldn’t make to much of a difference. Front load the season, it’s crying out for this!!!!! But don’t stop there do as much before Xmas as you can! Many will be called off during this period that’s when they get rescheduled.
The problem I find with teams local to me is that they enter pointless competitions like the Wycombe Senior cup or the Anagrams or the Slough cup. Some teams enter all 3.
Perhaps rather than stop the competitions altogether there should be a cap on the number of cup competitions entered. Just an example, Aston Clinton enter lots each year and they always seem to be the team that play catch-up.