Young players get plugged in when they're ready. I believe a young player has a better opportunity to succeed when he's surrounded by experienced players. For example (and sorry for Irishing the thread!) Martin Moore has benefited a hell of a lot more from playing with the full squad in the Heineken Cup than away to Treviso on the same day that Ireland played New Zealand.
I'd like to see a more meaningful A competition than the B&I Cup. What we have at the minute are disjointed A provincial teams who change from round to round, English championship teams who don't care and Welsh and Scottish semi pro sides. I'd bore people to tears if I did a thread on how I'd attempt to change the structure of European rugby so will try not go into too much detail. A proper A structure from August to December (interpros, games against other Pro 12 and Premiership A teams) with the AIL taking over from January to May could work.
In their equivalent domestic leagues which already exist.
Agree that the whole season is flawed, could be so much better.