I doubt very much that this will happen, but it does make sense making repulsion higher tier and perseverance lower tier. The switch also makes a sort of thematic sense, but this change is very unlikely imo.
However, from what I've heard and seen, the Dominas abilities are fine, but they are chanelled which makes them a pain to micro and also the targeting AI is terrible.
Not sure about Guardians. Its a beast, but I'm not sure how it could be balanced. In any case, the Subverter's Distortion Field and hull points need a boost so that it actually has combat value.
This would help the Vasari against Repulsion. Because carriers were overnerfed, it makes repulsion harder to counter. I'm not sure whether anything is exactly wrong with the ability though.