I use Timeless and as you have found, glossy is difficult because it has to be applied just right. If your strokes aren't perfect, then you can see the areas where too little or too much coating has been sprayed. I never spray full gloss, mix it in a ratio of 4:1 of gloss:matte if I want a satin finish, and 4:1 of matte:gloss for a more matte finish. I have discovered that if you spray from 2 feet away, versus one foot, the coating spreads out more and hence the "edges" or each pass aren't as sharp and hence the rows tend to blend better.
I have also found that the more gloss you have, the less chance of cracking there is. If I was very concerned, I would first coat twice with full gloss to really seal in the ink to the canvas, and then coat with whatever final finish you are looking for. Furthermore, I have found that even with pure gloss, if you stand back far enough, it tends to not end up as glossy as if you spray from less than one foot away. It must have something to do with the coating drying more while in the air before hitting the canvas.
Spraying really is quite an art form. I use the Epson Exhibition canvas now, but found when I was using a Canon brand canvas that it cracked like crazy, so that is yet another factor. The Epson has a lovely stretch to the underlying fibers whereas the Canon was more like cardboard, so everything is better on the Epson canvas.