Id expect Thomas Davis to win that league next season. I know Pats and Castleknock are coming down but Davis seem to be developing some good minor and juvenile hurling teams over the last few years. May not be winning A championships but that doesn’t count for much at adult level as Cuala have proven. Have reached the Minor B final this season despite being in division 3 and won the 16s B championship. They won a 21s B championship a couple of years back so the age profile of the team would be good. @allaboutchampo would know more about that than I would.
As for the difference between AHL 2 and 3 a lot depends on who is available for what teams. Lucan are currently in AHL 2. If they had their full compliment of players they should be wiping the floor with the likes of Isles and the rest. But I recall them losing to Crokes second team in the league and Crokes were taking players from their third team during their third teams match with Isles. Castleknock lost their dual players to football as far as I know and that would be a major reason for them being relegated. Pats playing without Rushe suffered. I think Barrog lost a few of their AHL 3 league winning team and it held them back.