I think Lovren playing may have more to do with how pissed off VVD was the last time Gomez played alongside him. I've not seen him that annoyed since he first joined us & had to constantly berate people, & his own game suffered.
I think Gomez is boss, but he's clearly gonna need playing time to get back to his best, & considering we have two matches before a match against City, which may well be astonishingly important in the history of the club, never mind just for this season, I think it's understandable that Klopp wants Lovren up to par & a decent understanding between the two CB's again.