I don't know, Mathos, I personally love FD as falco at times.
I would never take a fox to FD but I think falco does well against shiek on that stage. A lot of times, I'd even prefer playing against marth on FD than platform stages as well.
I used to think CG on FD was too good but he can't CG you if you don't miss l-cancels and keep mobile with lasers, right? Yes, I know he can tech chase to grab but honestly, I'd rather take the risk of being CG'd than being uptilt/uaird and tippered on platforms. FD gives you more mobility with lasers than platform stages, making it less likely to get grabbed. Get grabbed on, say yoshi story or battlefield, you aren't getting away from uthrow to platform combos without taking in a lot of damage.
Dreamland, as Mathos said, is the other stage I like playing against marth; tippers don't work on platforms, utilts are a little less effective, and it is a bigger stage for falco to run around and abuse lasers. Dreamland is good pretty much against anyone, even peach IMO just because of the reasons I mentioned.