None.
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It's so sharp... Anyways I think we should compose a faq that could hopefully get pinned. I think that is a great idea!
And while were on the topic, what are some other topics we used to have in v4 that were good and pinned? Like terrain contest and hall of fame!!! we should get one of those going but is it true there are not mods right now? so it would have to be like makeshift threads huh? hmmm I guess we could figure something out 
NudeRaider -- blessed innocent soul knows nothing of the strife we had before EUDs were discovered 
DarkenedFantasies -- Probably just didn't care. For example, at some point before release, they've updated the graphics of some of the Protoss buildings (Forge, CyberCore, Citadel, Observatory, Arbiter Tribunal), but instead of properly re-rendering them with edited 3D models, they did crappy copy-paste jobs on the rendered graphics.
Ultraviolet -- I suppose we'll likely never know, but my guess would be that they already saw it operating successfully and there was no monetary incentive to finish the original work. And the dev cycle in old school Blizzard was so hectic, it's possible it just got forgotten about after the original game got released. Plus there's an element of existing MPQ files that were packaged with the original discs becoming outdated if they updated it. And it's not like they remade the original MPQs, they just made new ones for BW specifically