My guess is he'd be a good appointment but still not the Klopp or Guardiola we need, like the good times in the Van Gaal or Mourinho periods. So basically a B+ appointment.
Don't care that he's "never won anything" as he made Southampton much, much better, did well at Spurs and made a CL final in his final year. 86 points and +60 in 2016/17 was basically one goal from a typical title winning season (average number to win Prem is 86.91).
Do care that his style of football doesn't seem as obviously impressive as Pep's possession or Klopp's pressing, though I tend to be a sucker for that over pragmatism (would have torn my arm off for Sarri after Napoli).
I've watched less non-Prem football than ever so can't really comment on guys doing well like Gasperini (3 at the back would suit Wan-Bissaka but he seems to like playmakers more than wingers which isn't a great for us, and I've read his system works best against 3 at the back which also not great).
The guy I'm surprised isn't rumoured more yet is the Slavia Praha manager, as they held Barca to 0-0 while playing a high line and have scored 45 and only conceded 4 this season in their league, which is insane. Any Czech posters interested.
We need transformation and long-term thinking, but if we're just hiring for the next 2-3 years while that transformation occurs with bringing in 8-10 new players, then having Pochettino get his teams to work hard, which isn't nothing, would make the process less painful.