You get the impression that Arteta lives and breathes coaching and under Pep he at least observed a lot of factors regarding managing players and the squad. He also knew exactly what he needed to do about squad attitude.
Whereas Lampard seems to have got a bit 'Billy big bollocks' and thought management is as easy as getting players to press hard whilst spending a fair but too. I don't recall anything he did at Derby being particularly impressive? Yet there he was being bigged up and fast tracked.
As a coach I think you have to do the hard yards. Spend some time either as an assistant coach or spend a few years at a club lower down. There are so so many aspects you need to be good at or at least have good ppl around you.
Although, it may just be the case that Lampard isn't cut out for it.
I kind of get the same impression, but I am also desperately aware how little I would know about it based on press conferences etc.
I do believe it is fair to say he didn't become as good as he did based on thinking it was easy.