When Frank Del Rio, Sr. was our 'guest' at the Vista Founder's cruise Meet & Greet, he spoke to us for pretty much the whole time. He was affable but very clear: Tubs, jacuzzis (whatever they're called) on the balconies of the top suites are a no-go. They're often not used but also costly to clean and maintain. So, voila. None on the new Vista (nor, I would guess, on any future Allura class ship).
If you were there -- or weren't -- I'm paraphrasing, so don't get too picky with me. 😂
Linda