Overrated?

Yes.

Maybe.
He's made a few fairly unimpressive movies (New York New York, The Color of Money, Kundun, Hugo...).
But he's still one of the last inventor of new forms in the medium (with his recognizable use of whip-pans, still images, soundtrack, intricate long takes, rapid forward tracking shot, etc.) and has spawned many imitators (early P.T. Anderson -also influenced by Altman-, Guy Ritchie, David O'Russell, to name a few... even Eastwood's Jersey Boys feels like it was shot by Scorsese).
There are not that many contemporary directors, besides Malick, Mann and Fincher, from whom it can also be said and whose films are instantly recognizable.

No way. I've seen 22 of his movies and I'd say 18 of them are good movies and maybe 7 of those are great.

Despite this being a troll thread I actually think Goodfellas was MS's last good movie. Everything after that was repetitive and mediocre. Especially the whole DiCaprio collaboration was horrible. That said, Taxi driver, Raging Bull and GF are among the best cinema around.

Nope. Not at all.

In some aspects, yes. My pet peeve with Marty is that he relies too much on voice-over narration to tell his stories. It's not that he doesn't do it well, it's just an easy out for filmmakers.

Imagine if Marty adapted 'No Country for Old Men' which uses an open narration by Tommy Lee Jones, but then continues to use it as a plot revealer for every character in the movie. That's how different the movie would be, and he'd probably inject country and rock music songs from that era (1980) to give a temporal atmosphere to the movie as he sees fit.

A more recent film "Silence" also uses narration and it works effectively but again I feel like Marty doesn't trust his audience enough and has to present his story in a benevolent manner rather than trusting our own eyes to view the world he's presenting us.

Oh most definitely yes.

He is of a dieing breed.

We will miss the like.

Soon all directors of power to shape their movies will be gone.

All big budget movies will be super-prescreened, super-homogenized...with every word of dialogue scrutinized as to not to offend one group or another.

Enjoy.....The taste of bland things to come.