Q1 - the Bass Module stinks on wireless unless it is 1-2ft away from the bar. I had mine <2ft away wireless and it was great, when I moved it to ~8ft away its junk. I have tried changing 5ghz wifi channels and moving interference as far away as possible. You will get distortion and at low volume noise that sounds like its blown.
Q2 - I would just in case
Q3 - Yes
Its confusing how well the wireless speaker bridges work yet the Bass connectivity is horrible unless you wire it.