Interesting question.
When MTM revealed the updated PF22, some were heavily critical of it. A couple of Youtubers ripped shreds out of MTM in suggesting it was a lazy or band aid move. In particular, the fact that the foam cannon body itself didn't change to accommodate a new bottle, that the adapter plate was a cheap and nasty move.
The thing is, if you look some of the other foam cannons that offer a "wide mouth", they have a similar arrangement where the foam cannon body is screwed onto a plastic adaptor that then winds onto the bottle. The MTM solution differs in that the adaptor attaches to the new bottle with a bayonet style fitting.
Some also suggested that the bayonet fitting was imprecise, inconsistent and difficult to work with. Even my supplier notes the following -
"Please be aware that, as this is a new product, it may initially feel tight and sturdy. However, with regular use, the foam cannon bottle will become more flexible and easier to handle over time."
Thing is, I experienced none of that over the four I have in rotation. I actually like how this bayonet fitting works, its quicker and more convenient to remove than screwing on and off like the competitors or older MTM foam cannons. The adaptor cap also has a rubber o-ring to ensure a snug fit and no leaks. I also like that I could convert an older non-MTM foam cannon to this wide mouth format.
I've found that you remove it from the bottle while gripping the adaptor, not the cannon body......................
Overall, I think the update is better than many would have you believe.