I have no issues with the controller either think it was a great addition, were I had a gripe is that it was the only way to operate the vessel, so not an addition but the sum total of controls.

Like if you were bolted into a vehicle, with no way to interact with the outside except a tiny window and only a game controller, it is a lovely piece of efficient engineering and does everything you need, but if this controller maybe gets damaged for example it's cable was unfortunately pinched off by someone's shoe. When you realise at a 1000m the closest thing to a god is that controller working and taking you safely back to surface in time or being stuck and hoping the guy who got you into the mess, that his, only other plan the dissolvable ropes on the weights actually work and you get to surface and get found and unsealed before air runs out.