I agree with some that History Graph was a better graph. Unfortunately I deleted almost all of them and replaced them with the SuperChart, and since then I have had problems reading the graphs. The History Graph was much better to read because of the grid lines and labels on the x-axis. Tap-and-hold is not as user friendly as to just take a look at the graph, no matter what research says.
One other major problem is the difference in the scale if you have two or more datasets and choose scale to height %. A combination between no labels and different scales on the same axis is a disaster. I see now that you plan to fix that, and have one y-axis for all streams, that’s good.
Then there is the ‘Live’ option. I missed that in History Graph, but 30(?) seconds are usually not enough too see a development over time. Instead you should have implemented live update on all the time sets, like in Thingspeak, which I used before i started to use Blynk. Then you could set up a screen as a display which is always on and show development over hours for what you are measuring. Today that is impossible because you have to switch between time sets to update the graph.
One thing that is better in the SuperChart is the binary style graph, perfect for on/off states. So not everything is worse, and with the scale to height% fixed you are on the right track to make a better graph.