i think the problem is that it’s still a relatively new technique and directors/animators/DOPs are yet to really learn how to use it
Tron 3D was pretty good as the extra dimension was used almost exclusively behind the field of the screen (ie nothing coming out of the screen towards you)
this makes for a far more comfortable and enjoyable viewing experience
Having watched Piranha on my laptop screen it’s obvious that certain scenes have been created purely to gross people out in 3D (throwing up over the audience for instance) and that’s evident despite the 2D rendering i viewed.
I’m sure people said the same thing about stereo audio when it started to become common place after the Beatle began to champion it. If you listen to early stereo recording there is a fairly brutal and naive amount of panning going on, it’s not until engineers and producers got used to it that it became more than a ‘special’ effect in recordings.
I’m happy to give 3D a chance to mature before condemning it, if used correctly it has the chance (on the big screen at least) of enhancing the overall experience