Prepare yourself for a shock mate; Pep gets things wrong. He's great, but he's not infallible. There will be blunders and the occasional oversight. He got it wrong in Porto, has got some things wrong this season, bought some absolute duds in his first season here. Phillips, it's looking increasingly likely, is one those mistakes.
And no, I'm not a football coach. I judge players with my eyes. Lets frame it like this:
Would he get into Madrid's midfield? No.
Would he get into Barca's? No.
Bayern's? No.
PSG's? No.
Arsenal's? No.
United's? No.
Napoli's? Inter's? No.
I would argue he wouldn't even get in Newcastle's current midfield. You can include Spurs and Brighton too.
If he's not good enough for any of the aforementioned midfields, he shouldn't be good enough for ours. Leeds was his level, and I'd stake good money on him being binned in the summer.