I think if the Leaderboard was increased to Top 100 then it would still show the very best, as well as overcome the problem that the LBs will be dominated by a few maps. But it requires much harder work. I think that really, F.A., since you are the one doing the work, you should just decide what you are willing to do, without anyone trying to influence your decision. I like your democratic approach in principle, and I tried to do this when I was host of the DCL. But the player base is too small and not engaged enough for a functioning democratic process to take place, as stormtrooper pointed out.
I change my vote to NOT include the previous challenges.
But I have one question - what does it mean on my player page...?
The replay is counted as a loss?