OK – If I understand you correctly your suggestion just enables me to use a client on my phone to control Squeezelite and server. It means that the display on the pi will not show what is playing.
It is unfortunate that you are not convinced that the Jivelite problem could be fixed. I certainly wanted to use the pi in the way I described.
Would it work if the Squeezebox server was on a separate pi?
pi 1 would have Squeezebox server and accesspoint in standalone mode.
pi 2 would have Squeezelite, Jivelite, Display, Bluetooth and Wifi