Although the leagues are very competitive and taken seriously for the most part, as they are linked to following years championship. only 8 teams in the division means less dead rubbers towards the end.
I think with the split-season every county would benefit from breaking the link between league and championship in terms of the issue of missing county players and scheduling.
The league affecting the championship seems to cause a lot of problems to no great benefit in those counties where it is in operation.
With so many counties getting so many intercounty championship games under the new intercounty structure, there is likely to be a good stretch of time when intercounty players are unavailable to their club especially at a time of year when conditions are perfect for football.
It's not like the old days when the championship was straight knock-out and half the 16 counties has one championsip game and 8 had two.
I think the league/championship link has more negatives than positives nowadays.
You might need to restructure county leagues in terms of size of divisions/increase the number of relegated/promoted teams to avoid dead rubbers at the end and add a relegation structure to the championships but that's a fairly easy fix overall.