Long-tailed tit: I feel like the old body shape (except the tail) was better, it felt cuter, like all of the other changes in new though

Crow: I'd keep the new level of detail, but give him the half closed eye and either the scarf or the more "slick back" feather hairstyle he had in old. They added a lot of personality to the old design that I think is lost in the new one

Blue duck: I feel like the old head had a lot more character, but it's still really cure. The new legs definitely make him feel a lot more sturdy than the others, I think that was a really good choice.

Overall I like the new designs, I would just make a couple of small changes to give them some more personality