Change the algorithm for general strengthening
I've noticed taht if you choose an advanced topic to strengthen, more minor topics will get strengthed alongside it imperceptibly, without a notification. But when you click the general strengthen button on the course's main page, the course directs you to the earliest topic that isn't fully gold.
I think it would be nicer to have an algorithm that puts you in one of the later topics instead, or lets you do more than one topic in a single session. That way you could strengthen many topics at the same time without having to manually chose a late topic.
Unfortunately, course creators have absolutely no input on that.
If I'm not fully gold, I always do the most advanced non-gold course first. When I am fully gold and I want to practice I generally try to do one of the most advanced topics.
Not only does this make the gamified bit of Duolingo work better, it also helps me learn the language better.
And it would be very nice if the Duo programmers would do this automatically. But (like devalanteriel said) the folks running the Swedish course don't do the coding.