We all know that the AI for followers is generally more retarded than a handful of dead butterflies, so here is the deal. Title says it all, really.
First, followers should have more detailed combat control, similar to F2 (attack -> weakest, strongest, whoever is attacking me; use drugs -> anytime any drug, stimpaks when hurt a bit, stimpaks when hurt a lot; burst mode if applicable -> never, always, be sure not to hit me, don't worry about hitting me, for some examples).
Second, as much as I myself do not like it, they should "whine" if they have some medical malady (I remember Vic always saying "Owowow" and following me with the speed of a snail until I figured out he had a crippled leg...). It also seems that drugs work differently for them, some apparently not at all for the matter (I went to the glow with my follower, gave her some radx, and always gave her radaway the same time I used it on myself, and while I survived the trip relatively intact with about 12-14% rad, my follower had most of her stats reduced to under 5... from which I assumed that radaway does not work for followers as it works for players).
Finally for now, wasteland doctors should have the option of healing followers, too. This one is an unnaturally short suggestion from me, isn't it?
And now, I await your thoughts about all these rants.