I've never heard of you playing Cage. I might be misinformed, which is my fault if so.
There are certainly characters which zone and counter zone better, but no one really keeps Cage suppressed. I have always maintained Cage can fight anyone on the cast. Not that he wins all match ups, not that he has a good answer to all opponents, but that he can fight anyone.
And D4 being -6... unless you run cancel it, your "turn" is over. At -6, his fastest answer is 14 frames that is easy as hell to get under. However, he can still get work done with it and it still basically serves every purpose it was used for.
None of the changes hurt Cage badly, but it is annoying that he's getting "nerfs" when there is far more ridiculous stuff and people come in here making MMH comparisons, which I'm sure you can understand how annoying that is.