[kirrent]

Getting overloaded is common in stressful situations in aviation where it's often called getting behind the airplane. It's the reason we're taught to aviate, then navigate, and then communicate. It's a graceful degradation where by purposefully ignoring what's not currently most important you can focus on what's most important rather than failing at everything. For me flying gliders, the most stressful situations I've been in are winch launch rope breaks with questionable land ahead possibilities. In those cases I've never made a call that I'm entering a modified circuit. Despite a decent amount of experience, I'm just too busy.

Relatedly, gliders are really good at flying themselves. I heard a story about an aerotow where due to a miscommunication the instructor and student thought each other were on the controls. They only discovered this once the instructor praised the student for their best take-off yet. Similarly, learning to land feels like it's about doing the minimum possible. Keep the nose up and just wait. So not only are good pilots paying less attention to distracting inputs, they're also spending less effort controlling the glider on the output side.

[stavros]

I don't know how passenger gliders are designed, but if they're anything like well-designed RC planes, they'll stall by dropping the nose, cruise with a slight up pitch, and have a tendency to right the wings.

That does make a craft very stable in flight, to the point where some RC craft I've used land themselves (albeit a bit hard) when they lose power.

[kirrent]

Pretty much yes. Trim to your desired speed in level flight and you can go hands free. Large fins mean strong yaw stability, long wings mean strong roll damping, dihedral on those long wings is relatively large as well so you're stable in level flight. Nearly all gliders are very well behaved in stall and mush forwards without being likely to drop a wing.

As far as pitch, elevators tend to be close to neutral or produce negative lift. There's generally not a noticeable pitch on the aircraft simply because you want the fuselage as closely aligned to the airflow as possible to reduce drag.