Well that's the thing. She-Hulk was always considered as tier 2, below her cousin. If I recall, she wasn't even at the 100 ton area like Thor, Hulk, Hercules, etc. So essentially, her reverting to a savage hulk is no different then bruce savage hulk being stronger than his professor hulk form. It just mean she's preferring to be this way, just like how bruce prefers his stronger form over professor hulk. Nothing wrong with that.