Eh... I get you don't like they went really campy with the Z-Move names, but honestly for most of them there's really no problem. As
Detective Barricade said, most of the current Z-Move names are snappy and easy to remember, something a kid would want to shout out. Not that I don't have my problem with a few, but I think we're encroaching on wishlisting territory here (or at least onto a topic where everyone gives their take but the discussion goes nowhere). We can come up with alternative names all day but that won't change the names aren't changing. We can certainly point out if there's a problem with the name and how it doesn't make sense or just sounds odd, but I feel coming up with alternative names is just inviting pages of posts of similar nature taking the discussion nowhere.
I don't see how it breaks immersion because, well, all moves are made up. A move's name is nothing more but a verbal command the Pokemon recognizes as a certain technique it knows. To the Pokemon they probably think of the moves in more simple and descriptive terms, the fancy names are for the sake of the trainer. What the trainer calls "Gigavolt Havoc" the Pokemon is thinking "Super Strong Electric Bolt".