I will be content with Drogba or Nani as an alternative to Morata or Sanchez for the following reasons:
1) Drogba will have only a one year contract. He will not be an Amauri/Iaquinta type of player. And surely we can take good advantage of his CL experience.
2) Nani's deal is basically a Low Risk + High Reward type of operation. We are transforming formation and dying to have a proper RW for ages (Krasic

) and I don't think any one here would prefer Candreva or any other RW in the same price range ~12m over Nani.
3) We are not in an ideal financial situation to pick the best long-term player for each needed position (LB, RW and CF). So there should be compromises, and I'm willingly accepting to have Drogba for a one year solution and to bid on Nani for 12m.
If Nani & Drogba join, as a worst case scenario, rest assured that you are only going to watch Drogba in Juve jersey for one year, and Nani's wages will be performance-related.
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Barca got Rakitic for a 15m bargain. They are going to sell Fabregas for Chelsea for a nice sum. Hopefully this will loosen-up the Sanchez negotiation.