I'm gonna say something that's not really that popular, but I can't think of one signing we made last year that's a bad signing.
I think the key is in the team identity that you mention. I'm not convinced that the players we have play togther well as a cohesive unit, and I think that's what is letting us down. In other words, it's not that the signings were bad, it's just that they weren't the right combination of players. I therefore think that it's going to take some skilled management to get them working well together. Whether that is Timmy or someone like LvG remains to be seen.