Is there a way to download/export sensor data?
Something simple could be implemented with a trigger that after XX day(s)/week(s) all the raw data from YY sensor is emailed to user as CSV file. This would allow further data analysis by the user instead of simply viewing it through your online graphs where data points are averaged depending on the time scale selected.
I’m not sure how long the data resides on your servers and when it is parsed to averages after a given time frame (and therefore losing data?) but having the ability to at least manually download the raw data would be nice.