The nuts used to fasten the end of a pneumatic cylinder are not a consistent size to normal nuts or standoffs. We have found this most annoying as none of our wrenches would fit the pneumatic nuts. I would like to see pneumatic nuts that fit standard wrenches.
You’re asking VEX to redesign the pneumatics they sell or switch to pre-existing pneumatics that use 8-32 screws. That would be a significant change for a problem that could be fixed with a monkey wrench or some pliers (and paper).
I do agree it would be convenient if the nuts were 8-32, but it seems like the costs outweigh the benefits.
Perhaps the screw size coud remain the same, but with a wider nut that could fit onto any previously sold cylinder and fit the
wrenches.
Screw thread sizes generally come with just one size of head head, but it may be possible.