Heard Butland isn't as OP this FIFA, I guess it depends on what the rest of your squad looks like?
De Gea has great links for chemistry if you wanna stick him in a La Liga team too so you'd be sorted for a keeper all year, or you could sell and improve the rest of your squad since keepers are dodgy as fuck at the moment!
1st choice
Butland, Moreno, VVD, Smalling, Clyne, Coutinho, Bakayoko, Sane, Firmino, Salah, Mane
2nd choice
Karius, Van Aanholt, Hummels (can't trade), Tah, Cedric, Can, Hendo, Gini, Ox, Vardy, Gray
I basically rotate the sides to keep on top of fitness. 2 games with the 1st XI, 1 game with the 2nd XI.
I'm relatively new to FUT, really, so I might be doing it wrong... I've been doing the Squad Battles and loads of SBC's lately.
I did think that about the keepers though, as they're generally shite in this FIFA I might just stick with a shit Butland over a shit DDG for the sake of 200k+ coins.