The problem here is not a "super high line"
The problem was actually the reverse. The problem is that the structure has collapsed, the front group are now ambling about allowing Brighton's CB's and midfield to advance and pressure ahead of the defence has disappeared (Solanke starts by following the keeper whilst nobody else follows him in, he's now out of the press - and what the fuck is Johnson doing here, absolutely nothing constructive leaving no pressure on the player who plays it through to Mitoma whatsoever) and the problem is the game has been allowed to stretch out, leaving big spaces. The defence have actually dropped and FB's are in orthodox FB positions.
The second problem is that having been put under pressure by the actions ahead of them, the back four do not deal with basic stuff competently at all. Porro is wrong side and doesn't try hard enough to prevent Mitoma crossing, fuck knows what Romero is doing (maybe his positioning is correct but I'm not sure) VDV fails to cut out the cross and Udogie can't kick a fucking ball because it's his wrong foot ffs).
Second goal features all the same issues. Shit pressure, structure has collapsed and stretched the pitch and then defenders can't do basic fucking things competently.
This is one of the big differences between us right now and say Klopp's Liverpool - which at times had it's weaknesses exposed (tactical and structural like Fb's being part of the attack andTAA not being quick or good defensively) but they had people like VVD, Matt/Konate to compensate and a bunch of 5-6 forwards who could score their way out of trouble. As well as Fabhino in the 6, not fucking Bentancur plodding around.
You look at that Werner ball for Johnson or the Kulusevski ball for Solanke - such simple passes to create high value chances fucked right up, then up the other end defenders (including Bentancur) wearing fucking clown shoes, not able to do the simplest things like tackle, kick a ball or block a shot between two of them.
Ange's system comes with risk. But fuck me, we could mitigate that with some better players all over the pitch.