That bit is so wrong based on what I've watched. He is terrible defensively, really, really bad. He is so easily bypased it's laughable really. I've found myself getting annoyed watching him. The way he looks down at his feet as he runs back, like Javi Garcia used to do iirc, started to irritate me too
On Dembele and Thiago being crocks:
Dembele
17/18: 7 games missed
16/17: 5 games missed
15/16: 5 games missed
14.15: 0 missed
13/14: 0 missed
12/13: 8 missed
https://www.transfermarkt.com/mousa-dembele/verletzungen/spieler/19368
Thiago:
17/18 19 games missed
16/17: 5 games missed
15/16: 5 games missed
14/15: 26 games missed
13/14: 54 missed
https://www.transfermarkt.com/thiago/verletzungen/spieler/60444
Thiago would be a gamble, thus I'd try and do a deal which is heavily apps-based but Dembele isn't injuryprone. He'd also be relatively cheap, PL proven and someone who'd rotate perfectly with Dinho and, given his ability to drive the ball forward, KDB too.