Looks too bulky but if you're bored with the fusion, go for it. Personally, I might buy another fusion for when this one wears out. I like mine so much, I don't want to be stuck when's the fusion is discontinued and mine wears out.
So why or what exactly are you looking for that's different. The fusion is about as thin + protective as I could find. Buttons are nearly same as without the case, and back is protected but can be seen. It's also been very scratch resistant.
That was it! I just played back a voicemail and it did the same thing when I was covering the sensor. So glad I asked the forum, I thought it may be a glitch.