Glass back rumors? That would be awesome. I think the iPhone 4 was the last premium feeling phone out there. Samsung please rethink your accent touches, no gaudy chrome strips, no huge gaudy Samsung logo on the front, and don't do that awful moire pattern on the bezel like the Note 4. Just give us a nice black bezel that matches the screen turned off, some black or dark silver matte surround and a glass back, and no logo on the front or at least tone it down a bit.
Front speakers would be awesome as well. I'm confused why every phone maker doesn't do this, makes a huge difference. Make the FP sensor touch based without having to slide like the iPhones. Debloat touchwiz.
I do have a dream wish though, that they incorporate a digitizer like the Note 4. I know it would eat into Note 4 sales, but really it's the same strategy as Apple who has one large and one small of the same phone. Samsung should concentrate on less models anyway and I think they would do GREAT with 3 phones, a small Note type phone would be the S6, a large phablets like the Note 5, and probably a cheaper alpha type phone for the cheaper markets.