"Things Change" seems to be a somewhat unusual song. I'd like to say it was well-done but upon closer inspection (I have been working with this song in much detail laely), I must say I'm not overly impressed with very many elements of it.
I actually didn't have a huge problem with the ending. Compared to a lot of LBT songs, both the start and the ending of "Things Change" seemed fairly typical of LBT ballads:
-Big fancy chorus, however short, repeated a 2nd time
-Slowdown
-Slow instrumental closure of the song
I never really felt that "Things Change" sounded overly abrupt on its ending. My concerns with this song are actually the instrumental music in the background. upon inspecting it closely (though I haven't looked at the entire song in detail yet, just first couple of minutes), there are some strange elements which are relatively difficult to reproduce. I also find it difficult to hear what is going on in this song. The instrumental voices seem to cover each other up and there are all sorts of little effects all over the place, on pianos, guitars, and who-knows-what, most of which don't seem to make a lot of sense. More than once already, my ears have been confused as to what I'm actually listening to. I hear a chord somewhere but when I try to mentally break down the sound into its individual parts, it no longer exists. I don't know what it is about this song but effects and sounds seem to just "appear", from no apparent source. I blame that electric piano; it has such a vast frequency range which appears whenever it strikes a note, it's hard to hear around it. This song is so simple yet so confusing at the same time.
Upon a first listen, the song sounds very simple. Taking a closer look at it, the song is filled with seemingly random elements which, to me, seem to be there mainly to make the lives of people like me who attempt to reproduce it, very...interesting

The ending...I'm actually glad they didn't make it much longer. If the song was to be extended much more, it would have needed to be done very smoothly and very professionally or it would just sound...too long. As the song is right now, it's basically what I expect from an LBT song; short, to the point, fade in, fade out, slow start, build up, brief final chorus, slowdown, quiet exit. What they could have done is added one more line before "it could change into something good" to smooth out the ending a little bit. That being said though, I don't have any huge complaints with the ending. I must say, I like the harmony in the singing near the end.

Overall the sound *sounds* nice from a first or second listen, but if one looks at it in detail it may sound more "confused" than many LBT songs.