The reason I mentioned naivety is simply because Ange strikes me as someone who has a very high level of self belief but as I explained before just because someone has a high level of self belief doesn't mean they have the ability to perform at certain levels.
He may have been in management for a long time but the jobs he has taken have never been at this level before, the PL really is another level it can't be stressed enough and sometimes self belief or a system that was dominant in other leagues is simply not good enough in this league.
Ange has even hinted that the PL may be too far of a step for him which was an odd admission but again, he is pretty honest so maybe a bit of self doubt is creeping in but like he said, he will die on the hill playing this way, even if it doesn't work because he's done it his entire career.
Also, I understand that teams have adapted and that's the reason we have struggled after our initial success, however my concern is, if they have figured it out already and we are going to continue playing this way, will adding better quality players really make that much difference? Or will brute forcing the system with better players simply override any tactical advantage teams have against the system?