David Villa maybe back in 2013, i think we should have kept him for a season more and then could have bought suarez in 2014 as we did. And again, suarez too, even him we should kept for one more season, if not more.
Plus neymar is there too, but what i think the main problem is that we didnt find the correct replacement. we just wasted money after that. If new was here, it would have been better for us. But i m still not that sadwith him going, then i m with not finding a good replacement.
Neymar obviously. After Neymar left, Barca was never the same again since Bartomeu failed to fill in the shoes of Neymar.