a) I wish the roll mode would be a "scan mode", so you actually could see the signal.
b) I wish to be able to do measurements on math channels.
Blue a and b is mine.
a) Please explain perfectly what you mean with "scan mode" and also then explain - for what. (if you want it sweeps and draw like old analog oscilloscope with very slow time bases and there is memory/adjustable persistence crt. This is not coming - reasons like "nice to have ...just because I like and want" is not enough.)
I can actually see signal in roll mode just as old roll paper plotter works (but default time axis reference point is wrong in roll mode - need FW fix or user set horizontal reference to right place).
b) if you want measure math result trace then you need learn hown to do it. Oscilloscope can... missing part is - what/who.
But yes naturally there is some limits limits... some limits also stay there. Only way to out from some of these limits what are in this very cheap instrument is - more money out from pocket. There is no free lounges. Except... buy this scope and you get lot of more than you pay
Just example about measurement where (nonsense) math trage is input to measurement
(Not current public FW version... no time to check if 1.1.3.3 works perfectly same for this matter)