I must admit the arena changes have been positive for me except of course for:
Mini pigs who refuse to die. I had one fall many stories from a ballon and survive placing itself in a location that could not be reached. 😡
Unreasonable bird order. Has Rovio ever explained why we cannot choose our birds from the whole list of available birds?
I believe you should be allowed to choose which bird to fling. Not just one from the 3 in view.