The thing is, that you cannot shift out of JoJ, thus making your speed useless (if the opponent team happens to have a Pally who isnt a douchebag).
As a pally, you might catch the pally who JoJs you, and instant stun him, then insignia out, drink Swiftness Pot, and freedom yourself, if needed. The other pally shouldnt catch you up then.
As a Drood, however, you have no stun/whatsoever, and your forms only award 30/40% speed, and, on top of it, you have no slow/snare immunity, you can only dispell the by shifting, thus making the trick much more difficult, at least imO. (You can always drink a Swiftness Pot, however.)
But, still, Drood is one of the three classes that CAN FC, so it will work. ImO Pally is superior in some points, but then again, inferior in other ones.
I can provide you a chardev profile, if you wish.
sofar,
forthelichking
€: Forgot about HoTs though. This will make Drood FC even more viable (mb even better than Pally), but imO Pally has a better *burst CC handling* (for the 6s of freedom), and with a Swiftness Pot you can outrun your enemies, making further CC handling (€^2: and keeping yourself alive with HoTs) not needed, as your enemies cant catch you up.
€^3:
http://chardev.org/?profile=449805 There you go.