Deactivating a plugin in case of a missing dependency is a bit risky. If just once a dependency is missing it would be directly deactivated. For example during an update we may run into an issue where a plugin dependency might be missing just for a short time frame. There may be also other edge cases where this might be the case. It would be better to instead trigger a notification only. I would show this notification only to super users but we do not have anything loaded at this time.

Any other ideas?