On your third point - just looking through the subs, I can only see one player who matches that description - Brian Corby. Good young player and probably doing well with the U21s. He is only out of minor so couldn't have played senior yet, it is not that he is of lesser quality than other lads. I would doubt that there are too many put out by it. By and large, our best hurlers are making themselves available for the team with the exception of Zane (as always).
The likes of Joe Campion, Gearoid Burke, Dayne Peacock would be a few more, i do accept your point about Corby been with the u21s