We used to have IL leaderboards for SMW, but they were a huge mess. There were too many levels and categories and most of the best runners didn't bother participating. The times that did get posted were often not even as good as normal RTA times. So the boards were removed. There have occasionally been suggestions of remaking them, but most serious IL runners (myself included) don't want it to happen so it's not likely to.

SMA2 is very close to SMW. In the majority of levels the fastest strats are identical with Mario (Luigi is a whole extra basket of problems). The physics and the level design are both mostly the same. SMW is also far more popular than SMA2 as a speedgame (more than 10 times as many runners). So if we couldn't make it work for SMW, I don't really think the mods will be very interested in trying IL leaderboards for SMA2.

As a note, your YI2 and YI3 times can both be improved by a game-second without cape, or several game seconds with cape.