Anyone noticed the KR web site Reserves 'Locker Room' page doesn't appear to be upto date? Any ideas who is left under the new Under 20s age group rule and who might be going out on a dual registration to get some experience?

Rovers under 20s this season will be mostly last seasons under 18s side. They are featured in the Academy profiles on the website. I wouldnt have thought any would go out on loan.
I wouldnt be surprised to see the Latus brothers go out to get some experience along with Beaumont and Mariano.

Possible, but Morgs doesn't rate the new 20s set up or the dual registration scheme, where does that leave the KR fringe players or promising youngsters (any names) then?

Liam watts has certainly gained in experience from his loan spell.

He has but he was a lot further on in his development than the lads who are moving up from the under 18s this season in my opinion. Not sure any of them are ready to be exposed to sustained first team rugby yet at Championship level.
Its also worth noting that the biggest prospects at Craven Park are still eligable to play under 18s Academy rugby this season so they will probably alternate between Academy and Reserve grade to aid there progression.