Lets be honest, Kelty played a master stroke by entering the EOSL when they did as there was only one genuine league opponent to challenge for the league and then a SOSL team to get in the LL. Basically 3 cup finals to get into the LL ( Both games against LTHV and a game v the SOSL champions), the rest have been cannon fodder.
Given the number of teams now potentially moving to the EOSL these teams could face a long time trying to get out of the EOSL league because even if they do win the league they could still possibly remain in the same league depending on how they fare against the SOSL winners. Remember only one team can possibly be promoted every season and the season could be finished early.
Even the league winners may not move up a league. IMO Bonnyrigg are realistically the only team that could emulate what Kelty have done this season.