Lightwell is so incredibly annoying, even coming from a 8/8 HM raider. We use it, we just don't *like* it very much. It isn't *fun*. I hope they buff Lightspring up to be equal to Lightwell, so it can be more of a choice than a "idiot mode" glyph. There are inherent advantages to the Lightwell mechanic (versus Lightspring) already, as Kelesti pointed out.
Lightwell/Lightspring is kind of like Astral Form for Druids (or should be). If you really like Lightwell, then you don't glyph it. If you really hate Lightwell, everything it stands for, and you burn a little Thrall effigy with a Blizzard T-Shirt on it every expansion when you realize it is *still in the game*, then you can glyph it.
Of course, if they really make it weaker than Lightwell, no one will glyph it except LFR heroes. And we'll be back to square one.