I play the tria Bretonnian list since it was published and am quite content with it. It is also broadly accepted around here.
Bel mentioned the changes before. I have to add that the Trebuchet was changed too.
Especially the Pegasus Knights are a nice addendum. I don't leave home without at least a unit of them.
I used the Trebuchet a few times and it is usable for bretonnian players who want to be defensive.
I took the relic about three times and have a nice scratchbuilt unit for them but the rules are a bit complicated (although not as complicated as the kislev warwagon

). I could imagine they fit perfectly into some fluff-armies (crusade-style) but I do not use them too often.
The hippogriff is nice for those who want the honour of having Louen Leoncoeur and his mount as part of their army but we all know how often generals are sent into combat...
My win-loss ratio is about even I'd say but without the Pegasus Knights the army list would be lot more boring to play.
Greetings,
Gerald