But you haven't said how they have improved. Briscoe was excellent at Hull, Chester was also a class act at Hull, Cooke won a Challenge cup at Hull and led the team around the pitch, Hodgson was a kid third-in-line for the hooking role and Wheeldon was no worse than he is now. I don't see how Morgan has improved any of them. Admittedly it might be difficult to judge with Hodgson who had plenty of potential but was never going to usurp the two ahead of him unless they got injured.

Agar has by far been the most important person in Briscoes development.

and has not produced/devloped a player, oh and dropped league positions

I never watched them week in week out at Hull FC. I can only comment about there performances at Rovers. Similar to yourself not being able to watch them week in week out and only being able to judge them on how they performed at Hull. and how they now perform in derbies and the odd game on sky.

Well if the debate is switching to players whom coaches have improved during their tenure, I can certainly offer the following:

Ben Cockayne - rookie at Donny in 2005, now a SL regular
Scott Murrell - academy player at Leeds - SL regular and England train on squad member in 2010
Peter Fox - decent player at Wakey, England international since joining Rovers
Kris Welham - academy player to SL regular
Michael Dobson - great player when he joined, but improved his consisentcy and significantly improved defence.
Ben Fisher - NL standard hooker gone on to top 100 SL appearances, scorer of great play off tries!
Liam Watts - Cas academy to nominee for YPOTY in SL last year - shortlist of 3