I know the show was trying to cover a sensitive subject, and I know a lot of you saw it as really personal, but the show isn't good enough or consistent enough to handle this sort of stuff in the way it deserves.
That said, it had some good moments, like Kurt and Karovsky in the hospital. The show has always been something that can put together a great scene or two like that, and Kurt in particular has always been really good when given good dramatic material, so it wasn't a shock by any means that it was such a good scene.
As for the music, it was the weakest competition they've done, IMO. I know the music was secondary to the plot in this case, but it was still an issue.
And of course, the show continues to be wildly inconsistent about the portrayal of Sue, the timing of various events (regionals and cheerleading nationals seem to have both taken place at 3 different times in three seasons, not to mention the ridiculous rezoning that must happen every year to make the rules for who they face in which round so different). And I think the wedding stuff is ridiculous, and the way the kids mostly have no family (I mean, Rachel's parents were clearly here for the first time, despite being so supportive) is a pet peeve I've always had.
I'm not a big fan of the final moment either, but whatever, it is what it is. The show shits on that character all the fucking time and has flipped their personality so much that I'm not shocked they did something like this as soon as their life seemed to be in order.
So basically, I felt it was an OK episode, better than many this year, but still far from flawless and one of the weaker competition episodes they've ever done. It certainly wasn't on par with the best episodes the show has done (like when Kurt's father had a heart attack or the first season finale or whatever).