5- I don't know if that's even an issue that needs solving with Anki. If that ever becomes an issue with your deck it's probably because you don't add enough cards per day (or preferred time period) and enough cards per subject. I wrote about this in a comment last week I think, but a simple vocab card should actually be like at least 6: vocab <-> image (2), vocab <-> native vocab (2), vocab <-> write out native vocab (2). The text-based answers should still contain an image, too, for better embedding of the knowledge.

People that complain that Anki ends up being just Q -> A memorization are often using it superficially. And even then, won't the algorithm just phase the useless cards out anyways when they become too easy?