I'm one of the odd balls I suppose.
I don't think there is one perfect indicator for every situation. I think they all have their pros and cons depending on what kind of indicating you want them to do.
Yarn is for sure the most delicate landing, and bite sensitive. It will work well over spooky fish. However, adjustability (after clients have been fishing it), and ability to float heavy loads in rough water are it's faults.
Palsas are perfect for quick applications, work fairly well for light landings and will also float a fair load with the use of additional palsas. They however are very poor in the adjustability department.
Frog hair footballs. Excellent floating qualities for heavy loads, excellent adjustability, and are sensitive enough for light applications even in the larger sizes. Bad news, they are not the best for spooky fish and light landings. They are also single use, and as a guide....that's big money down the drain for me. One last thing, they really need to be applied to a fresh leader before any other rigging has occurred.
Lightning strike and similar toothpick pegged indicators. These work very well in floating heavy loads, and are easy to adjust and stay put very well. They hold a lot of the same qualities as the frog hair indies, and the cons are similar as well. They are however reusable and that's nice.
Anyway, there are tons of others.....but my opinion is the same.......still no perfect indicator for all situations......but there is a perfect indicator for each different situation. YMMV.