I don't think we need to change that much. I still think the way we played at our best is the most effective way to play the game. Key to future success is to keep Messi happy, prolong Iniesta's prime, help Neymar reach his potential, bring through our best young talent and fix our defensive problems. I think that Luis Enrique can can achieve the first 4 points but it is up to Zubi to help him bring in top class defenders.
I really do think that even if we are the only team that does it, our style of play is worth sticking with. We don't need a radical overhaul except in defence, that is the key in my opinion. With a great defence we would be champions already and going for the treble right now.
As much as Zubi has become a bit of a joke on this board, he still loves the club and will want to be seen as a success himself. So I am sure they have thought long and hard about this and sounded out other options. And it may seem like the easy option but I do think we need to stick with our style as I think it will give us the best chance of success.
I also think tactics are not as important for us as with other clubs, I think motivation and fitness are more important factors. If we have a fully motivated squad at peak fitness with an improved defence then our style of play is more than good enough as it is.