First off, we need you on HIVE! @steempeak has been by far the best interface for accessing the Steem blockchain and I'd really like to see you be the "flagship" front end for HIVE.
Why? Because now that we're really going to have a decentralized community, more people will be putting sweat equity into promoting HIVE to the outside world... and the most suitable entry point for non-techie social content users would be a re-branded Steempeak.
So let's talk about the NAME. At first, the inclination is to include the "Hive" name... but WHY? Maybe the best name out of the suggested batch is actually "PeakSocial," because it says what it's about ("social"), and it's readily scalable/transferable. As "Peak Social" you can still continue to serve Steem if you wanted, and HIVE, and if some other blockchain social project came along, you could serve them.
Think of PeakSocial as a "wrapper" for many potential things. Maybe even customized/customizable front ends for some new version of SCOT tribes?
But if you wanted to include HIVE in the name, my second choice would be (not listed) "HiveSocial" which again has a high level of "self-explanatory."
What do I like about HIVE? For starters, I like the name. The last "social web experiment" I really liked was now-defunct Tribe.net. Names like "Tribe" and "Hive" have great self-explanatory marketing ooomph. "Hive" is the sort of name that's competitive with "Facebook;" it doesn't sound silly. "Steem" was always a weird name. What else I like about HIVE is that it represents a sort of "landmark case" of the power of community consensus decentralization... if what we're doing here actually works, it will set a precedent that this kind of structure IS, in fact, capable of standing up to challenges from "the establishment."
Do I want to stay on Steempeak? Well.. to the limited extent I will still be part of Steem (I plan to keep my account marginally active to occasionally come back and make a pitch for HIVE) I hope to still use the interface... but I'm not attached to that. Do I want you to stay with Steem? Not my call. I hope you make HIVE your home base.
As for your witness, I would strongly suggest HIVE. Seems we've already seen that JS does want to be part of governance, at least when it suite him. I would submit that running a witness on HIVE makes a lot more sense, even if it involves rebuilding to some degree.
Anyway, I'm totally with @kus-knee in agreeing that you have a GREAT PRODUCT.