When you have devices that use a ton of energy it makes the graph entirely useless for the devices that use less. Being able to tap a device to filter it out of the graph total would allow for more granulated results so say you have a light that’s getting left on more than you want. Lights are not a big draw but every little bit helps especially if you go solar.
I don’t think that a filter would be required.
I think - in this case an information on the percentage of your usage or additional information of the kWh per device would be also helpful.
something like this, for example: