Have never had a clogged sprayer from Glamour II, and I have sprayed canvas most days for the last several years. The trick is to empty the gun and spray some hot water through it if it will go unused more than an hour or two. I have seen no tendency for the gloss version to develop precipitates, although of course any matte coating will do that.
When comparing gamut hulls from the same printed target before and after coating, the smallest changes I have seen come from three relatively thin coats of Glamour II. After-coating profiles generally shift the entire gamut down towards lower values, but carefully applied Glamour II seems to shift mostly only the darker areas, leaving the lightest tones almost unchanged. If anybody wants to see screen grabs, just holler. That results in a greater overall gamut volume, rather than the same gamut made duller. From that and from what my eyes tell me, I infer Glamour II is nicely transparent if applied properly. Don't know why I bother to argue about this.
Lexjet's product is a usable coating that IMHO does not have the good leveling qualities of Type-C and GII. It does however have good transparency. I would compare it to Rosco's bargain acrylic more than to GII. Whatever else, I can store 24 gallons of GII concentrate under the 8300, but the equivalent 48 gallons of Type-C, Timeless, or whatever other use-undiluted coating would not fit. Or, shipping 48 gallons of use-undiluted coating would cost a few hundred $ more than shipping GII concentrate, so there!