Got my PC up and running and spent a good hour flying circuits. Afterwards I took her up high and started pushing the envelope. I am not an airliner pilot but I am a student pilot and I have to say the flight dynamics make sense to me. Fully upwards elevator deflection puts the aircraft into a stall, relaxing pressure the aircraft takes itself out of the stall. I did manage a couple deep stalls too. Maintain steady pitch pressure and roll the aircraft will do a barrel roll...the 707 which was a much less nimble airplane famously performed a barrel roll. I do wonder if the folks doing more extreme fighter pilot stunts have crash detection turned off as I often ended up ripping the wings off the plane attempting to recreate some that I saw.
I think a lot of peoples negative experiences with the flight model come from #1 - it being designed purely with yoke users in mind, and #2 - folks misunderstanding what "heavy" controls mean. In a real world airplane, as speed increases, the actual pressure on the yoke increases and it is harder to physically move the controls. I imagine a lot of the crazier stunts would take an immense amount of physical force on the real plane, which cannot be recreated on most desktop controls.
With desktop flight sims, especially joysticks, we are used to "heavy" controls meaning it takes a larger stick movement in order to produce the desired effect. This is more akin to how airbus controls work, with stick deflection commanding roll rate as opposed to the literal position of the control surfaces. Remember - in a 757 the yoke is connected to physical cables.
I personally prefer the interpretation BBS went for as opposed to the INI A350s attempt to create "heavy" controls at launch, where there was a measurable delay in control surface response an attempt to create the illusion of "heavy" controls.
Performance wise I have to be honest, I am running mostly high settings and had 60-100fps around KSEA. I have an Rx9070xt, Ryzen5800x3d, and 32GB of RAM. I did have a warning pop up that I was running out of VRAM so it looks like the memory leak issues reported are still there.
The textures are pretty shit, no real defending that. Systems simulation seems quite good - but I will have to do an actual A-B flight to get a better idea of the state the plane is in.