As recommended many times on this forum, if you want good mobile control of the DLive system, you really need to check out the third party app, Mixing Station. While I don’t believe it has been updated yet to be able to control the new Ultra FX racks, it does allow you control of all the other features you are wanting (Dyn8, original FX racks, scene savings/loading, etc). I’m sure it is only a matter of time before the developer David gets it working with the new FX racks as well.
Just to clarity, the latest version of Mixing Station is compatible with the DLive 2.0 firmware, but I don’t believe there is a way to change the setting of the new FX racks in the Mixing Station software yet.