Voted YES/YES.
But a few considerations must be made.
It´s always good to remember that huge maps and dozens of players, using every bit of RAM and every core/thread/GHZ of the CPU to provide an epic gameplay experience were among the original promises of E:WoM.
I always expected then fulfilled eventually. Trusted SD so much that my current PC was built with that kind gameplay in mind, so I would definitely pay to get it (despite the fact that it was originally a promised feature)
But it would depend on the price and on the 64 bit version actually offering something (or lots of things) new.
I wouldn’t pay just for the possibility of someone, someday, making a mod that will use all the power of the 64 bit version.
I guess It´s also good to remember that, even thought lots of people got 64 bit OS, they don’t necessarily have the hardware to take full advantage of it.
Maybe offering that DLC would just lead to disappointment and bad publicity when someone can´t play the extra-huge map with a dozen dozen of players because his PC/NB wasn’t up to the task.
I guess the answer here is the same for the multiplayer question, focus on making FE a hit, them think about expansions...
With rather tiny large map, 4 brainless cheating opponents and no multiplayer MoM is still more enjoyable than the current FE. So I guess more attention should be payed to the basics before working on those DCLs
Not criticizing or bashing, those are just the 2 cents of someone who really wants FE to became a classic.