To answer the original question in that post - yes, I have found DSI's polyphonic glide to be useful. True, it's not what you expect and can be unpredictable and difficult to tame, especially when playing broken double octaves with your right hand. But I've found in small amounts that it works well for providing a subtle natural sounding nuance between notes, especially if you're playing contrapuntal music, rather than one chord after another. It's inconsistent, but you can turn that to your advantage. It would be nice to have both types of portamento available if possible, but, if limited to only one, I'd rather have the current type. It makes DSI synthesizers unique from others. But if DSI is signaling that they're moving on to a new type of portamento with the above picture, I'll be fine with that, too, since I have plenty of the old.
I used glide in this piece. It's on throughout, but is only triggered here and there. You can hear it "trip" and even trigger the delay at 8:07, but at other times it makes for a really nice effect.
I don't at all mind these little imperfections. It's part of the analog mystique. In an age of "perfect" computer-generated music, it's a reminder that some music is still made by living, breathing, imperfect human beings.