If you don't know the word was Ewok, it's hard to swallow your credentials on the subject.
That IS completely your opinion that Sebastian Shaw looked like a pedophile piano teacher. Tons of other people saw why he was chosen for the role(and how he appeared as a Force ghost.)
When I say "disappointing" I guess I mean it is supposed to be jarring. Let's be honest, as scary as the Vader mask is, it is majestic. It became iconic for a reason. ANYTHING(whether you believe it or not) is going to be a "disappointment." There is NO visage that can match the power of that mask(hence, the mask being the overarching marketing symbol used for the movies, both old and new.)
Oh, MY! I have been served by a Star Wars geek! Cue the pulsing techno music now:
Credentials? You have got to be joking. I think you take this film just a little TOO seriously.
Atually, chief, I'll be honest: I did know the word ewok, I just thought it was funny, sarcastic and a little willfully perverse to call them Wik Wiks (wasn't the main Ewok named Wicket?). You know, some people can actually know a little about a film, and still not quote dialog by heart.
I was 8 when Star Wars came out, and I saw it about 10 times in the theater. The Lighthouse Point Twin in Tequesta, FL to be precise. I went down to Miami with my sister (I believe in late May, 1980) to see Empire.
By the time Jedi came out, I admit I'd started to move away from the whole experience. I saw Jedi (at the Smithfield 3 in Stuart, FL, now a rehab hospital). I thought it was a big, stinking pantload. I gave the entire trilogy a look-see again a few years ago in Boston, the first one was fun, Empire was a thing of beauty and Jedi was a big, steaming diaper-load. Sorry if that's blasphemy. I can yack myself silly on a thread about a film series I loved as a kid, but I don't take it that seriously.
Put the light sabre down and back away. Repeat to yourself, Skywalk, "It's ONLY a movie..."