You're at least the 10,000th person who has had this same confusion about scenes. It's quite common, if not universal, to expect parameter values to vary between scenes (without use of channels). The AxeFX/FM3 have a learning curve and it's to be expected you have to learn some things to use it, but at some point, when an issue is a point of confusion this often, you have to admit it signals a problem. Maybe the problem is the design of the software (the scene controller interface), but another possible culprit is the terminology. If scenes had a name something like "bypass snapshot" it would help avoid this problem. Or maybe the
https://www.fractalaudio.com/getting-help/ page just needs an FAQ page to answer common questions like this that keeping coming up over and over and over.
i'm not sure this is the same "problem", unless i'm misreading; it's not too clear what's happened either.
i think the main "gotcha" is that you change Scenes
first then adjust it as desired. a concept that is assumed is that Scenes aren't active until you choose to click them - this is not true, they're always there, and always set "somehow" until you design it the way you want.
to avoid this, we'd have to assume that everyone always starts on Scene 1, and then after they're done designing Scene 1 (when is that exactly?) it somehow copies to all other Scenes as a starting point. but then what happens? does Scene 2 copy to Scene 3, etc. etc.
ideas have been suggested over time, like making ALL Scenes default to every block off and Channel A selected, but people had issue with adding blocks or going to Scenes and having no sound and wondering what is going wrong. nothing is going wrong, but the blocks are all off, and you'd have to turn them on.
so at least for now, any idea that has been suggested requires the user to select the Scene and adjust it the way they want, whether it's everything off and channel A, everything on, or some random setting.
Scenes aren't automatically set to "the last setup you made" and i think that's the part people are expecting. there's no way for the Axe to know the last thing you did, and then when to stop copying the last thing you did so you don't automatically mess up a different Scene.
you'll just have to choose the new Scene, set it up the way you want, and you're good to go.
as for Parameters changing when you change Scenes, that's just not how it's ever worked. before Line 6 gear had Snapshots - which do change parameters - there really wasn't this much of an issue. Scenes were always presented as "changing Block On/Off and Channel select" only.
many users are coming from Line 6 gear with Snapshots, seeing people in videos or on forums casually say "Scenes are the Axe version of Snapshots" and expecting it to work the same. it doesn't though. so that's not an issue with how Fractal is communicating their feature set, it's other users saying the wrong information, or just being casual with their description.
when i teach the Axe, i always say "Scenes turn blocks on and off and change channels, that's it." and once i do, people get it.
Axe Scenes are not the same thing as Helix Snapshots. Scenes were introduced on the Axe2, Firmware 9.0 in 2012 and pretty much still work the same way today.
people tend to stick with habits they develop from their first piece of gear. it's human nature. many people start with Line 6, maybe the HX Stomp, as it has the lowest price point. then they want to upgrade or try something else, and Fractal has ~$1000 devices which allow more people to buy them vs a ~$2000 price point. since they're used to Line 6, they might think that other gear works the same way and have that headache when they try something and it doesn't work the same. i think that's what's happening in most of these cases.
i see "scenes aren't changing parameters like snapshots did on my helix." i explain what Scenes do. they say oh so that's worse than the Helix. then i explain Channels and changing them with Scenes, and they go OHHHH that's amazing and just as, if not more, powerful and saves CPU.
so it's an adjustment like most anything new.