CleverFool
Warlord
I think one potential weakness the longbow might have is flanking. It's true you can create an uber wall of melee then long bowmen, but how long would it take to create and maintain? One must remember that units are more expensive and not as numerous in CiV, which means creating a wall of units that long may be simply impractical.
That and one could imagine an England player overdoing it a little with all the long bowmen, and not having enough defence against cavalry. They should be able to (in theory), skirt around the line of melee units and deliver a quick blow against the archers in the back. We'll see how it works when the game is actually released, and I still see them as strong, but more of a complement to melee units than an entire army in their own right.
That and one could imagine an England player overdoing it a little with all the long bowmen, and not having enough defence against cavalry. They should be able to (in theory), skirt around the line of melee units and deliver a quick blow against the archers in the back. We'll see how it works when the game is actually released, and I still see them as strong, but more of a complement to melee units than an entire army in their own right.