Next week, I'll be levels 5 in both Geometry and Combinatorics, and Number Theory, which I'm pretty excited about. However, what if there are very little problems I can solve in those levels? It might be the case that level 4 is more interesting for me, just because I understand the questions better. However, I probably wouldn't downgrade on purpose, because it took effort to get there, which I would not want to give up.
I would like to request the ability to see (and solve) all problems of the levels lower than yours. This way, a promotion cannot lead to dissatisfaction, and there would be no reason to downgrade purposely. Of course, we shouldn't get rid of the level system: it was very encouraging for me, I wanted to solve very difficult problems. Also, level 4 problems are not very easy at all, so it would only mean more challenges on this website, and thus more fun. :)
What do you think? And if you have considered it, what was the reason for not implementing it?