yeah, i think the Attack Decay might be the best you can get in that realm in the polyphonic mode, whatever it's called
still, the rapid fire nature of many passages created by glitch pedals are probs too much for the envelope follower/attack detector to handle, even if the poly mode lets the envelope reset on a new attack
so, yeah, your trem idea might ultimately out-perform the A/D, although even there the settings and mx levels will make a big difference. Maybe something involving sample and hold/random - could actually add to the glitchiness while softening the pop of the attack much of the time....

Also, I guess some of the glitch pedals allow for some degree of control over grain shape/envelope, but I'll leave opinions on the workability of that option to the experts....