there is still an online requirement,
True – the GF was designed from the very start to offboard most of the computational burden. It was never a secret, and not once did they say otherwise. I am totally gobsmacked every time someone kvetches about this. “Gee, I bought a Prius and am bitterly disappointed that it still has not turned into a Tesla!”
the poor quality and hard to use engrave features
I must have been using it wrong for the past two years. If only I had known my engravings were poor . Do you have an example that proves the GF is at fault?
the recent discussions about a subscription model is disheartening (even though it all conjecture),
GF has from day one said that some features would likely be available by subscription. It was in the ToS every purchaser agrees to. You read it, right?
the lack of delivering on their open source commitment (this was a huge selling point for me, I’m a tinkerer at heart)
As multiple people have mentioned, the firmware has been released, which is what was promised. They never obligated themselves to open-source anything else.
putting all ideas in a mythical hopper
Mythical? Select Units, Set Focus, drag-n-drop, Pause Mode, and many more features were all hopperized suggestions. They don’t seem mythical to me. YMMV, of course. My favorite feature? Mute User.
the inability to operate in a mildly warm summer room (glad to live in the north)
Again, the temp range specs were published quite early on (well before the first delivery), so buyers had plenty of time to cancel their orders once they measured the ambient temperature in their home/shop/school.
I don’t mean for this to come across as mean, it’s just weird to complain about things that are either not demonstrably true or would have been obvious to anyone who read the specs & ToS. ¯\(ツ)/¯