From my experience I can do the no cooldown gltich anywhere any channel on my level 80 Jumeaux, pvp or pve. For some strange reason I can't get it to work no more than half of the time on a newly created level 35 Twin Fighter on both game modes. I'm not sure if it depends on the class or gender or level or date of creation, graphical lag, so it may be one or more of those factors which could be the reason for the confusion. I personally don't feel the glitch can be effectively used without being obvious to the opponments and the referees (there is one, right?). But it is an exploit and if used sparingly, it can be difficult to spot to the untrained eye so if the officials feel it would be too much of a hassle to look out for foul play from the Twins or humans disrupting the game by claiming the Twin used the glitch, I'm for allowing this awesome class to participate in a future tournament when the exploit is fixed.
Same here, i do not believe it is hard to see, but its all about numbers. Too much hassle dealing with the bug, and too much players against it. If there was a majority of players with this cause then maybe.