I almost always find the cabin temperature to warm on Asian carriers for long flights....Thus i find it too stuffy and do not sleep as well.
Though if I remember, this is a little less of a problem with BR than it is with KR, OZ, NH and JL.
As to the seats, the BR seats shown are superior imho to the new AC seats. The new AC seats are too restrictive when flat. I prefer the old AC pods.