The Tri-Zone valves can have some slight noise to them if you have them cranked all the way in one position. Try adjusting slightly off of being cranked all the way, and it should give you less water noise. What you're hearing is the entire pump going through that valve, its directing a lot of water. Those Tri-Zone (3-way) valves are actually about twice as long as a normal valve and will generally be quieter than the industry standard 2-way valves.
If the waterfall valve handle has a little drip to it, that's usually because someone grabbed the entire valve cap, and not the valve handle, and the valve cap loosened. Pull the valve handle that says "NJ" straight up and it will pop off, you can then tighten the lower circular valve cap piece.
If the larger HK16 jet faces are turning off/on too easily, give them some time, the plastic hardens after about 3-6 months and you will notice they become slightly harder to turn off/on and the flow of water is unlikely to turn them off.
I have seen the newer Balboa color display control panels fog up on a few occasions. Generally it's caused by direct sunlight hitting the panel or at a drain and fill when the water temp is cold. Keep an eye on it and if it doesn't go away, the dealer will probably replace it.
Are you using the gray @Ease smartchlor cartridges? If so, that system is designed to be shocked only once or twice a month.
Enjoy the tub, that's a nice one!