Of course our attacking system needs to be changed! TikiTaka is old and boring, every team knows how to play against us. The more direct style that Tata used in the first half of the season was way more efective and better to watch. The game we are playing now is just nonsense - win the posession, wait until the opponent get's all 8-9 players in front of their goal and then start to pass around the area. It is SO predictable that I don't know should I laugh or cry.
That being sai, we do need fresh blood as well. I love Xavi, but the rumour has it he is the one who demands tikitaka and whatnot. His time is coming to an end and his role should get smaller and smaller on the pitch.
Reus would be great, but it would be stupidity at the same time. Paying that insane amount of money for Neymar was silly, but what's done is done (and he is a good player, just not 86M player). If we didn't buy him last season and had bought one CB instead - things would be oh so much better
But as things are, we need 2 GK's, 2 CB's first. And then see what to do and who to buy more.
And as said above - Reus is much better with direct style of play, as is Alexis. If Barca played like they did in the first half of the season, Reus would be awesome. If things continue to be as they are, Reus would be kin dof a flop probably. Plus Neymar is here anyway ...