My main complaint is that it's difficult to determine camera state. My main use case is having it mounted to a motorcycle where I can reach the buttons but can't safely or easily see the indicator LEDs. Is it on? Is it recording? I have some
awesome videos of me sitting on a curb in front of a gas station drinking a Gatorade because I thought it was recording the whole time, and it turns out that when I pulled up and stopped the recording I was actually turning it on. That can and should be fixed by making a button that isn't so mushy. Even with bare fingers I can't tell you if I really turned it on without looking at the lights. With motorcycle gloves, it's a complete (and as noted above, often wrong) guess.
Okay, I'll strap my Pebble to the handlebars as there's a GoPro app for the Pebble. But the Pebble needs to go to the iPhone, which then talks to the GoPro iOS app, which then talks to the camera. Yeah, you can see where this is going: I spent more time trying to get all those devices to stay connected than I did riding.
Fine, I didn't want to do it, but I'll buy your $80 remote with status LCD. That piece of shit didn't work any better. I spent most of the time looking at an animated WiFi icon because it couldn't find the camera literally 50% of the time. If it did find it, it often wouldn't stay found. A single company made the hardware and firmware on both ends, and they still can't get them to stay connected.
Additionally, the thing eats batteries. I wouldn't mind so much if there was a way to power the thing while its in the case. There is a way, but it'll cost $65 for a waterproof case with USB port from a third-party vendor. I bought one. And about half the time when the bike fires up and pumps power to that connection, the GoPro's little pea brain gets confused and needs a reboot.
This is the kind of stuff I expect when I bought the cheap Chinese knock-off instead of the name brand. But I did buy the name brand, and specifically for this reason. And I end up still having the cheap Chinese knock-off experience, only at name-brand prices.