It's also a very large downside, one he is potentially not be able to fix. It can be difficult to always have the lead against a good opponent. If the opponent gets the lead, and manages to get to the ledge with his lead still in one piece, Falco is going to struggle a lot.
@Gheb: Regardless, nothing will be put in place to hinder MK's planking. LGL? Hurts other characters like Pit. Ground Time Wins? Not only laughably stupid, it can heavily effect other characters and screws up MUs. Not happening. The only way to limit MK's planking without artificially buffing or nerfing other characters is to target MK only. In which case, he needs to be banned. They won't ban MK, so nothing will happen.
@Yay: MK's? Nobody. Other planking like Pits? Depends on the character and stage obviously. For example, some characters like Ike can stay just far enough back and throw out large moves in attempts to hit the planker. Other characters actually have a chance of hitting them with their projectiles (Link, Toon Link, Snake to a lesser extent). And a few characters can simply use their amazing mobility/multiple jumps and risk hitting the planker as the planker isn't MK/attempt to steal the ledge themselves. (Wario, MK, maybe Kirby and Jigglypuff) Obviously, all of these things have a very small chance of success, but they are all bigger chances than what Falco has.