When I'm reading and replying to something interesting, this can happen sometimes.
Thank you so much for going through the whole thing, my friend! After the original blog and the reply, I don't think there's much more I have to add... Apart from this: I agree with you that the later seasons' songs often weren't as good as the early ones (so that's one area where I do think the show lost some of its quality). That might be in part due to the style of the songs – I generally preferred the more pop-oriented songs (the catchy ones with a more typical structure with verses and choruses) to the ones that sounded like something out of a musical. The latter work well in the show itself, but I don't find myself going back to them like with the former.
Actually, my favorite later MLP songs are usually from EqG (especially the shorts, but the specials also have good ones, like "Invisible"). And I can't resist posting another unpopular opinion: "The Magic of Friendship Grows" is a beautiful song, but I seem to be in an extreme minority having "Being Big Is All It Takes" as my favorite season 9 song. I don't know why, but I found the CMCs' songs consistently pretty good.
Yeah, it's a good idea to watch them when you most feel like it. When that happens, I hope you enjoy them! The MLP Wiki is a pretty good guide for the shorts, I remember using that to make sure I didn't miss anything.