The last thing that needs thorough testing is the vote abstaining. Unfortunately the NuBits crash and having to pay the final fee out of my own pocket for the NuBits.com open sourcing (as a result of the crash) has complicated things for me. I won’t be able to continue with the testing as a result for the time being. I’m not sure when I’ll be able to return.
Much of 5.0 code is complete though and simply needs to be confirmed as working, and maybe some restructure to the UX in how abstained votes are presented.
I’m not sure about the second question to be honest. We should have been testing trading by now, but the failure to upgrade the protocol has disrupted the process significantly. NuBits price crash has tremendously complicated things further.