If you're only aiming to impress people with your massive use of grammatical vocabulary, then by all means, keep writing your glamorous prose. But if you really want your audience to think about what you're writing, then you might want to keep your language free from confusing words.
This is something I struggle with sometimes. Like I said, I really like my big words. But what I like even more is when I can allow my audience to think about the meaning behind the words, instead of just wondering what the heck those words meant.
If I do nothing more than that, than making my language clear and understandable, then I really do believe I've done my job as a writer. Though I might drop a challenge or two along the way. A broader vocabulary never hurt anyone, after all.