Skyla is good, and I'm glad other players are recognizing how good the card is. It's not as powerful as some of the other search trainers in the game's past, but it is the best search supporter we have in Blw-on (kind of...Cilan is obviously better if you want energy off your search). Think about playing Vileplume right now, and how much you would kill to be able to somehow search Rare Candy out of your deck to get the t2 plume.
In general, I agree that Bianca is the worst supporter for cookie cutter builds of lists and playstyles, but I think as players get more used to the new format, they will find that Bianca will really shine. We're going to be playing in a format with more evolutions, all ball search, and probably more pokemon collcetor, which should lead to more cards being played down out of your hand on any given turn, which should give some good opportunities for you to use bianca.