Yes the glare on glossy screens is always an issue. I can't speak for the other brands but my Dell has anti-glare treatment which helps. It's still glossy but not so bad it bothers me. In a more flat orientation on your desk I would imagine overhead lighting could be an issue. I only use bounced lighting in my studio (torchieres with dimmable, full color LEDs controllable from my phone) so glare isn't an issue.
As far as precision goes it's plenty precise for mixing and recording (dragging faders, turning on/off monitor and record switches, etc.). You still have to go a mouse/keyboard for badly designed plugin interfaces. Some make the buttons and sliders ridiculously small. No touch screens have the precision for those.
15 to 20 years ago, I used to have a Tascam FW 1082 interface (like the one below). It had motorized faders on it. So I got spoiled. Moving to a touchscreen made me happy again.
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