I personally like the idea of a feat that improves your use of a familiar, as suggested by raleel. Make Improved Familiar orthogonal to Pact of the Chain, so it is equally useful to wizards and warlocks, ritual casters and magic initiates.
Some ideas, in addition to raleel's:
- summon two familiars at once
- assign control to another character for a period of time
- give familiar proficiency in all saves
- give familiar extra hp
- inhabit familiar: your body disappears into the familiar, and then can pop back out later as an action
- store a spell in your familiar that you can command it to release as an action
Not that you'd use all of these, but maybe a couple...
Some ideas, in addition to raleel's:
- summon two familiars at once
- assign control to another character for a period of time
- give familiar proficiency in all saves
- give familiar extra hp
- inhabit familiar: your body disappears into the familiar, and then can pop back out later as an action
- store a spell in your familiar that you can command it to release as an action
Not that you'd use all of these, but maybe a couple...
