Yeah, this whole tinfoil and "this should have been in 1.0" thing doesn't get you anywhere but deeper into paranoia.
Sure, full Midi Channel support "should" have been there from day 1, but for the typical ITB producer it was thought not to be such a big deal - and as was said, Live doesn't have it even in V10. I actually had this discussion with the devs before the release of 1.0 during beta and this was how my scripts came about as a temporary workaround - never thought it would be needed for so long.
How it's implemented now is pretty much exactly how I'd done it. And you even have it in the instrument layer device, so you can have 5 instruments layered by midi channel with ease on one track and still be able to edit the individual notes in a meaningful manner. Very very slick IMO.
There may be companies out there who scheme around with their features and updates to make a buck, but seeing this as how the world works is a bit too simple. Not everything and everybody is "trumpified".
Some features just need a lot of work or need the basis of the code to be changed - I would guess going to GPU for the GUI (and handling all the different APIs like OpenGL, Metal, whatnot) will be such a one.
Updates for the sampler were asked for a LOT. If that isn't what you need, just keep your old version until something catches your fancy. That is how I always did it with for instance Adobe Photoshop before they came up with that CC crap system. Which is also why Bitwig is not a (bad) subscription, you still are able to open all your existing projects without paying for as long as you want.
I personally found Live 10 an update I would not have cared for one bit if I would still use/own it. The difference is, that it came out 5 years after v9. I highly prefer the Bitwig way with constant meaningful updates.
That your pet feature is missing can happen no matter what the update plan. Live does not have VST3, no Midi Channel recording/editing, only does 64 Bit and is missing a lot of other things I take for granted with BWS.
In the end: Love it or leave it