Looking at ladders dynamics, at least in the 19x19 I’ve been in for a few months, I wonder how people choose opponents to challenge. I see that many, at least in the bottom of the ladder, challenge opponents just above them, when they could choose ones hundreds of ranks above, whom they would have a good chance to beat. I suppose they do so because they don’t figure out this possibility, or don’t bother to skim all the ladder pages up to find out, which can be a pain in the neck when you are around #800.
A nice-to-have feature, at least for people at the bottom of the ladder, would be an automatic suggestion of such opponents, based on a simple algorithm like : select “weaker” (based on general kyu/dan ranking) players that you can challenge, starting from the higher ranked on the ladder. For example, if I’m 15k I could find the highest ranked (on the ladder) 17k or weaker.
Not sure how difficult it would be to implement, just an idea.