Specifically for the imp, there's literally no reason at all to ever use the basic attack. The sting attack has a chance to poison, does more damage, has no limit to it's usage, and costs an action the same as the attack which does substantially less. Forcing me to select the sting every time when it's the only logical option to use is quite annoying. Any of the summons that has a similar situation should have their default attack updated to their most effective option.
