I'll start...

1) Do we get more romances?

2) Will the gearing system work the same as 6.0 (bind to legacy etc)? Will we get a new currency instead of fragments and a vendor to buy the sets from? Will EVERY set be available on the vendor this time?

3) Will there be more renown levels at 80 and will we get gear crates?

4) will there be new reputations?

5) Is there any plan to repurpose heroics to give more updated rewards than just alliance crates?

While I can't answer all of them.

They did mention new reputation in the Livestream, so I'd expect that for sure.

As for renown ranks, when I character transferred a character to the PTS my Renown rank was put to 0. But quests do give out renown points, so if I had to guess we'll all get our ranks reset to 0 for 7.0.