I swear I'm not picking on you man, you just have solid posts I want to respond to. I enjoyed your contributions to the Nova thread too, so I promise this is all in the spirit of good discussion and Im not just singling you out.
But everything you mention here, Oracle could do twenty years ago, and Superman can do now. Hell, Batman can do all this now. As with any character of any power level, you just use equal threats. When Superman became much stronger than a locomotive, he stopped fighting gangsters and started fighting other aliens. Vic's upgrades just mean he can fight a higher caliber of foe.
I tell you what, I could write a script that would tackle every concern you have. I don't promise that it'd be any good, but it'd answer every worry. And (writing ability aside) I could show that it can be done without sacrificing Vic's character. Would that assuage your concerns? And really, as with all things, it just comes down to the execution. A Cyborg exploring his new limits (or lack thereof) could be awful and boring in the wrong hands, or it could be amazing and fun and wild in the right ones. A more powerful Cyborg does mean that you need a slightly higher quality of writer to handle things properly (a problem Superman has had for many years) and that is indeed a limitation and it does increase the odds of a writer not getting it right, but the comic shelves are full of characters who can toss planets around who have all been in publication for decades. If they can do it, so can Vic.