mhhh kitteh you could take items and just put those in a completly different stash - with gomule you could pack them into another project thus they wont affect your grail but you have them and can show them of later - or just admire them yourself
Why is AT separate from 'other level 85' areas? Seemed puzzling to me.
AT is in its own category, because it is its own category.
In other words, its because AT running was so perfected that if all 85 areas would be together, anyone wishing to run say WSK would be in great disadvantage. Thus, this layout was born to allow people run both AT and "crappy" lvl 85s.