My favorite match up! To be honest, I actually am up in the air about which stage I dislike playing Falco on more... FD or BF. FD DOES yield a benefit for MK, and that's recovery limitations. Play a really good Falco on BF and see what those platforms do for him... it's intense sometimes.
Dair camping is becoming less and less effective as Falco players get more patient and willing to rack damage solely through occasional laser strikes. Falco players can also take advantage of any obvious rhythmic dair camps by flying up and making you eat a bair. After hitting once, it's back to laser camping while you wonder what to do next...
I think it is possible to take Falco out on the ground, but it's all about baiting and responding as opposed to an actual solid approach. Tilting just outside his tilt range is good. If he tilts first, MK's will hit because his has a hurtbox in it. Nairing about a body length away is OK if the Falco has the tendency to try and mix it up with SH bair. Also, if you find yourself in a situation where you think you're too close (homg chain grab!), simply rolling backwards can sometimes get the Falco to respond with phantasm. If you manage that, tornado/nair.
ALSO! About lasers! A lot of amateur Falco players will consistently high laser to low laser (short hop double laser pattern) and adhere to this pattern even if you dash towards them. So.... When Falco hits the ground, run. MK has enough time to cover a large portion of FD (probably half of BF too) and tornado (or nair) him before the second laser comes out. And since the first laser is over your head.... crisis averted! I personally like nairing just in case this method gets read, tornado commits you too hard for this match up.
Don't get too careless with dsmash though. Falco has a very good response to a shielded dsmash... and that's his fsmash. Yep. Falco can FSMASH a dsmash that is NOT PERFECT SHIELDED. And since his fsmash is pretty friggen huge, don't depend on shield push to save you, unless he's been pushed off the edge. Not enough Falco's respond like this, imo.
If you get dash attacked, shield it a bit longer than you may expect to shield any one particular move because of the Gatling combo. Eating an upsmash is no fun :-/.
That's about all I've got. It's a fun match up, but I personally think it's getting closer and closer to perfectly even as Falco's get better and better. Getting the gimp is just turning into "easier said than done" in this case.