I guess 5.2 isnt comming in 2 weeks after all, probably mid or early March it seens, that seens better and may actualy give them time to test the stuf instead of rushing the patch.
Also about the tunning of ToT if it is realy 502 to do the first normal boss we gona have a serious colapse on raid participation, my guild is 10/16 H (almost 11/16 damm you Amber Shapper) and weve been doing heroics regularly for over 2 months and were just now passing the 502 ilevel mark (average, I have 505 ilevel for instance but we have a terribly unlucky Dk whos just 498) so if you gona need 2 months of heroic T14 to start on normal T15 it simply wont work. Also 502 is completly prohibitive for ppl wanting to move from LFR to normals they cant seriously expect ppl to raid the previous tier heroic modes to gear if theyre normal raiders/LFRers.