The current tier wouldnt be so bad if wasn't for the giant pope hat - Yes I know we are priests, but c'mon...
People saying we've had shit sets for the last 2 expansions are exagurating, our T13 was easily one of the best sets of that tier (IMO) and the WOTLK sets (apart from the dreaded T9) were also pretty decent.
With regards to T15: I like the style of the gloves (with the sleeve) and I like the new direction of the burning candles on the shoulders - the libram on the waist is also a nice touch. However to echo most of the comments above, the colour and textures just don't work - they are all pretty dull - I guess the bottom one does firt in best with the style of the expansion (jade, azure) but it could do with some jazzing up! Make the the colours more radiant.
In shadow form this set will probably look worse, although the smoke from the burning candles might be it's saving grace... Might look out a Xmog to work around them.