Blame the Melee tournament community for locking these in as the community-accepted terms. :/
I suppose that goes back to the apparent reason why T.W. wanted a "basic smashwiki" - is SmashWiki intended exclusively for the tournament community? If it isn't, then just saying "there's a glossary" (IS there even one?) isn't enough - any reader fluent in the English language should be able to basically
follow every page and glean useful information from it without reference to any other page, with everything obvious enough for that much from the context. Whereas lots of SmashWiki is impenetrable to the casual reader without a whole bunch of prior knowledge (for a particularly bad example, see
http://www.ssbwiki.com/Zelda_%28SSBM%29#Combos - I didn't put the cleanup tag on it, but I fully agree with the sentiment), and that's the definition of "too much jargon".
Also, the Smasher: namespace seems half-baked, literally. Why did the individual players get moved out of the mainspace, but the "crew", tournament, etc articles didn't? Either the Smasher: namespace should encompass them too (which would be my preferred suggestion), or there should be another namespace or namespaces for them.