Well, I'd rather have characters from Arthurian lore portrayed by actors of the caliber of John Larroquette and Matt Frewer than the movies' conceit of having Excalibur be a "character" that flew around of its own volition and acted like Flynn's pet dog. God, those movies were so stupid.
Every time Noah Wylie shows up on the series, he reminds us of how silly those movies were. Like that scene in the arrow/dart shooting chamber when he was running around, screaming his head off and acting like an idiot...a perfect little taste of the original movies' flavor.

I'm really hoping his involvement on the show is limited to "rarely" or "non-existent" in the future. His character is the only part of this show that I aggressively dislike. Especially the jarring "romance" angle that the producers (though probably, Wylie himself) are forcing on poor Rebecca Romijn. I am sensing absolutely no chemistry between these two and his out-of-nowhere kissing her during both of his "special appearances" run the gamut of "workplace sexual harassment" to "super-awkward and clumsy."
Flynn aside, I couldn't be more satisfied with the rest of the show.