I'd be nearly as disappointed with him as I would with Carvalho. This is not the calibre of player that is going to elevate the club. He could be a decent "squad player", but I don't think we need any more of those.
Fantastic signing, but I wonder what the cost will be. I hope it's not in 50m region.
The main goal of the high defensive line is to reduce the spaces and make attacking team more compact. It's done to make pressing possible. Pep's 'high' pressing and deep def. line are mutually exclusive.