He's fine from a financial standpoint as he's free, but I can already foresee the forum meltdown when people realize he's nowhere near as effective as they hoped.
There is two sides to that argument.
One is that he may not be good enough for the standard of squad would want at Barca the other is he would still improve squad as it is just now.
He is a better CF than shite like Braithwaite by far and is an option out wide and run in behind opposition.
Will be fine for free and will improve the squad as it is just now. Worst case scenario he is sold for profit and he is not being signed as any big answer just another better squad option than is there at moment and allows for sale of other players from squad.