Not very surprisingly, I felt that every single one of the Wordtune versions was strictly worse than your original that it took as input.
(That doesn’t necessarily mean it’s useless. It might improve worse-written text. Some of its rewrites might be usable as the basis for something better. Sometimes you might want badly-written text of a kind it’s good at creating; e.g., it looks like asking it to be “formal” produces some of the same pathologies humans sometimes produce when trying to write formally, so if you needed examples of that kind of bad writing you could maybe get some with Wordtune. Not that there’s any shortage of examples elsewhere.)