I mentioned all of that to illustrate the reason why NRS will buff him. Like I said, he's a great character but his lack of usage in both tournament and online play pretty much guarantees him some buffs. I think a nice buff for him would be to make his homing missles unblockable. That would make his zoning even more dangerous and improve his setup game.
By that logic Superman, Batman and Black Adam will be nerfed. But we all know that aint gunna happen. They'll still be riding high with their free 30-50% combos. Buffing Cyborg for example isn't going to change the fact hes very technical, like Shazam. People will use 'easy' characters and the top 5 are by far the simplest of the cast.
People online are lazy sh!ts, changes like you propose may make Tournament more enjoyable to watch and maybe won't end with the inevitable Superman VS Black Adam or Black Adam vs Black Adam showdown, but online? Nah....Cyborg will still be a redundant character.
I have fought ONE good Cyborg since release, we had a good conversation and he gave me some advise on the Zatanna match up and I gave some to him. NEVER fought a good Hawkgirl, people just spam mace and that flying dash thing. Shazam has come up alot more recently in online play for me, but if I win they switch to Superman (I could name them but you'll have no idea who they are so whats the point lol). NEVER fought a good Bane, don't mean to blow my own trumpet but I could blow people out of the water with my Bane
As long as the top 5 are as good as they are, you won't see other characters as often as you want.
If you want to use Cyborg I suggest getting good with him now, because if they buff him it'll just be easier than jumping in blind BECAUSE they buffed him. I tried Shazam last night and just couldn't get a feel for him, the buffs hes getting won't help my issues with the character so won't be jumping on that train.