Why on earth are you comparing the goal threat of Busqs ( our holding midfielder) with Rakitic ( the elusive scarlet pimpernel ... they seek him here they seek him there ... where is he when they need an option to pass to )
The major question here--at least to me, is which midfielder best complements de jong and arthur (I am penciling both as clear starters). I am not saying it is Rakitic, but I don't think it is Busi. Arthur/De Jong/Busi is lacking in supporting the attack within the final 3rd--unless De Jong really surprises us. In fact if the squad is what it is now, I would say only play with 2 true midfielders (De Jong & Arthur) for the big games with Griezmann or Coutinho behind 3 forwards. Though I expect Coutinho to be sold.
BTW a midfielder has many roles, and scoring the occasional goal and contributing assists are important to many midfielders games and their contributions. A few do even more than this. One key element to a traditional midfield (in a 4-3-3) is their overall balance as a group, i.e., how they complement each other.
The truth is the Rakitic bashing is quite obsessive. Whether he stays or goes will have very little bearing on the outcome of next season. Ya'll are so up in arms who the 10th or 11th starter is. Adding De Jong and Griezmann has already drastically changed the squad and makes Barca no worse than co-favorites in Europe. (the only thing realistically that could have been the cherry is dropping EV, but even he may not screw it up with that amount of talent next year). Whether IR is sold or stays has an insignificant affect on the Barca's odds, ya'll just have objects up your behinds you can't seem to get rid of.