My dearly departed dear old dad, who I had the pleasure of checking out in the '47 and who used to fly around as many of our dear old dad's did, for purposes of aggression years ago, told me that a good flying display was,
1. Unpredictable,
2 Always precise,and
3, Forever safe.
I assume your dearly departed dear old dad meant 'predictable' rather than 'unpredictable'; and if that was his intention I am in agreement. I would also add a few other things to his list.
There are many aerobatic helicopter clips floating around the internet. Some are of actual displays and others are of practices and some are just plain reckless maneuvering.
There are also many types of aerobatic displays. Not intending to be a complete list, there are competition displays, show displays, competitive evaluation displays, military displays, and manufacturers displays. Each type of display has different rules and objectives. For instance, a show display is intended to entertain and the appearance of unpredictability is part of that thrill of a show display. Competition display requires the ability to do what you say you will do in the time you have to do it in accordance with a set of agreed upon rules. Precision is an important part of the competition process.
Display pilots do have days when they fly better than others. Small things can have unpredictable consequences in a set routine. A wind shift or sudden downdraft, a bird, a problem with your aircraft, or an ATC distraction. All can cause a pilot to fly a display with less precision than he or she would like. Display pilots learning a routine usually do so at a safe altitude and as they become more confident and precise they bring their aerobatic safety floors lower and lower. I have trained many pilots to perform aerobatics in helicopters and few are perfect when first learning aerobatic maneuvers or when perfecting a display. You need a lot of altitude to recover from an aborted roll that has pitch-coupled. When a helicopter departs controlled flight (and they do from time to time) during a badly executed loop it is good to have a little altitude between you and terra firma.
Regardless the type of display, there are always critics who would prefer one over another. Many will see a practice display of aerobatic maneuvers requiring great skill and ability and find fault with what they see. There will always be those who make judgments as to what they like and what they don't. They are always right of course. Who better to judge what you like better than yourself?
When choreographing displays I find it more useful to ask spectators what they didn't like about a routine rather than what they did like. I am sure the Red Bull team display (European or US?) would benefit from your candid opinion. Why not drop them a line and tell them what part of their display you found wanting?