I posted a thread on reddit asking for some more input on this topic. Here, I will try to summarize briefly what that discussion has yielded so far.

Many posters seemed not to think that there is anything wrong with how Minor Arcana is supposed to release.

Still, three suggestions for how to change the skill were brought up:

1. Have Minor Arcana give you the 250 potency damage Lord or 400 potency healing Lady depending on which normal arcanum you currently have drawn, with the skill requiring that you have an arcanum drawn.
2. Just remove Minor Arcana, add Sleeve Draw back in to make obtaining the optimal Astrodyne outcome easier.
3. Turn arcana in general into complete utility effects, removing any kind of damage buff. Only Divination would provide a damage buff.

What do you think of these suggestions?

I like all of them more than the currently planned version of Minor Arcana, but each of them comes with some issues in my opinion. Suggestion 1 might lead to the optimal play being to drift Minor Arcana until you can guarantee a Lord, which would feel unwieldy. Suggestion 2 just seems a bit too much like giving up, plus Astrodyne kind of brings with it the same problems current Divination does. I'd rather Astrodyne get axed than Minor Arcana, since buffing others is just more on theme for AST than a steroid for yourself. Suggestion 3 I think would need some more fleshing out, to make sure that the utility effects are varied and useful enough. Maybe someone here has some ideas?