Well there are plenty of custom games that are far more simple and straight forward than classic Warcraft 3. Especially if you're into Diablo II you may want to try a custom game called "Sunken City" one of these days (it's in the post if you ctrl+f you can find it), really rich customization options and classic dungeon crawling experience. Either way, it is going to be interesting to see how much love both Diablo II/Warcraft 3 get over the next year or two from blizzard.