I'm not big on alternate versions. In rare cases, I think they are better, but for the most part, I am not a fan.
Recent exceptions are Fates Warning. On Darkness in a Different Light, the extended version of Firefly is the one I much prefer. Ray told me that the extended piece was leftover from a different song, and re-worked into something for Firefly. If memory serves, he also liked the extended version.
On the same album, there is a song called Falling, which is a very short interlude acoustic/vocal piece. The original version of that song, which is included on a bonus disc as "Falling Further" is the full-on electric version, which is a normal song length, with a great solo (co-written by Aresti and Matheos). I really enjoy that more than the acoustic interlude.
But those exceptions aside, there are very few instances that I think alternate versions are needed. There's the song, then there's the live version of said song. And once in awhile, a translation to acoustic is cool. But I don't need multiple takes, v. 1, v. 2, v.3 with a whole bunch of different elements. I mean, they are cool to have, but I won't listen often.
Example - the sax version demo of "The Thin Line" by Queensryche. Very different, kinda cool. I've had that track probably since 1994 or 1995, and in 23 or 24 years, have probably listened to it less than 10 times. Just no real desire to.