Hardcore Starcraft fans will adore it, but Brood War proves to be too demanding for casual gamers.
As the name explains, Brood War features huge maps with ridiculously over-crowded enemy bases crawling with nasty heaps of enemy units, crudely forcing you to mindlessly butcher your way to victory even if strategic planning still exists. Because the maps are so big, the usual gamer may get tired easily out of planning every strategy move for every assault in a single scenario. However, true fans will find this their paradise. For me, it made me steer clear of RTS games for at least a couple of months after Brood War.
The new units only serve to add alternate options for your strategy without much direct offensive help, as the new air units mostly counter each other off. The dark archons are more interesting though. Once again, Brood War may not be ideally entertaining for the casual gamer, but is a gem for dedicated Starcraft or RTS fans.
KingLim