So I figured out something big about the falco MU that I figured I'd share here.
For a long time I had trouble punishing falco's SH double laser shenanigans. The best way I would figure is to run up and powershield to get really close, then either grab or wait for his reaction (spotdodge, roll, move back and phantasm) and punish accordingly. But the problem was that this became a guessing game where we didn't have a strong advantage.
This changed when I tried jab OoS. Jab OoS beats spotdodge by hitting the second jab as he leaves his invincibility, and you can time the first jab to have the active frames within the beginning of their landing animation, preventing falco from stopping us with his own jab. This leaves his only option as shielding as soon as he lands and jabbing, which we can beat by grabbing instead.
I lost to kismet a few weeks ago where I won the first game on SV, lost on BF, and lost my CP on YI because there was only one CP stage (no Frigate, no Delphino, no Halbred :/), but I feel confident after playing a few games with some other falcos I've got his number next time. Kismet I'm coming for you if you namesearch :D.