FYI, I prefer shooting water skiers from shore. If you have never shot video from a boat, you're in for a learning curve. It's better to capture from shore if your situation allows it because it's easier to concentrate to get the exact shot I want, without all the noise and jostling around in the boat. Its also quicker and more convenient to fly back to shore to change out a battery, versus stopping the boat to hand catch the craft, disrupting the skiers fun if he wants to keep skiing.
I won't argue the rest of the post as I've said my piece, but I will say that I agree wholeheartedly with the statement above, especially when the ski area is small and limiting. In other words, on most ski lakes, this is certainly the best option.
However, there are times when the perspective of the boat really helps with depth perception and proximity to the skier. When we do it, it's usually Robbie or Donna (my wife) in the driver's seat and me in the passenger (rear facing) and everybody else except the skier(s) are taking a stent on the docks. In other words, what is in the boat are ALL "seasoned veterans." This ain't their first rodeo and this ain't their first time in a ski boat.

That matters too. You know how people get when they go with you. 'Nuf said.
It's also much safer filming from shore. If there's an emergency on the water, it's all hands on deck in our boat, so the craft/multi takes a back seat. Bad situation to be in if you want to save your multi and the person in the water too. Thank God we've never had that to occur, but it's a possibility that's always in the back of our minds. The multi goes into a hover and then in the drink if the battery dies. The skier comes first (of course). No thinking involved.
It's also worthy to note that the boat driver needs to be acutely aware of the multi and its presence too. We tend to turn around quick, generally getting back to a skier in under 15-20 seconds. Habit from the old competition days, and a safety thing too. There's a lot of crap going on in the boat and with the quad when turning and returning to a skier that fast, and while the boat driver's primary concern is the skier down in the water, they certainly have to be acutely aware of the craft nearby too. As soon as somebody falls, it's a good idea to get the multi on up 40-50' (at least) whenever practical, especially if there's no need to continue shooting.
I'll also add that I keep one of these on all my quads anytime I'm over water. It may not be worth a crap, but it gives me some confidence and peace of mind, especially when flying my really expensive stuff. Buy one and Velcro it to your landing gear and hope you never need it,
https://www.amazon.com/GetterBack-Recovery-System-Velcro-Yellow/dp/B00GIYIU8Q