I think Barcelona still should make two transfers to specific areas. These areas are defensive midfield and centre-forward. Because in the defensive midfield there is still only Oriol Romeu. Of course players like de Jong and Kessie can also play there. However their main positions are central midfield so it is better to use them there.
Agree. Those 2 positions have no proper substitution players, even I don't think Oriol Romeu will be strong enough for defensive midfielder. Barcelona ideally must bring a stronger player in the position, but Barcelona has the problem with their financial. It makes them difficult to buy new players in the current transfer window.
For the other position there is only Lewandowski there. Barcelona don't need to spend so much money for bringing a striker. They can even loan someone who can be useful in Lewandowski's absence. Signing a backup striker should be even the priority for them.
They may expect Lewandowski can always be in his good condition. We know he rarely got injury, he has a good fitness. But I agree that it is not impossible for him to get injury during the whole season. Sure, Barcelona should get a loan for a striker at least, it is the best option that they can do. There are many strikers who want to play with Barcelona.
When Barcelona sold out Aubameyang that was very good to them,and was even scoring goals back to back for them,instead of them to keep him to compete with Lewandowski,they went ahead and sold him out forgeting the fact that players sometimes becomes tired as a result of fatigue.Lewandowski might still be scoring the way he was scoring,but if he should get injured,I think it will really be hard for Barcleona because he is the only striker that can give them the number of goals they would want.They are currently building the team around young players and if they should want to sign a new attacker,it should be a young player that has great potential,and it should also be a young kid who is not injury prone.Nervertheless,the transfer window is still some weeks away from closing,and anything can still happen.