Mr. Shue has ALWAYS been creepy and inappropriate! He was creepy and inappropriate in the pilot! Guy has no life other than the Glee kids, never has.
I remember when I first started watching the show, I was creeped out by Shue (also the rest of the faculty, actually) but then I got caught up in the Kurt & Burt Hummel storyline and frankly, that's what has kept me watching the show. Some of the other young performers are really quite good, and as for the writing -- well, it's TV, and it's Fox, and it's what it is.
As for "disrespecting Whitney" -- I thought it offered an interesting angle on why it is that people get so upset over the deaths of celebrities that they do not know.
If you don't like it, don't watch. If enough people don't watch, it will go away. That's how TV works.