"Over-abundance" (actually overabundance) is redundant, like absolutely certain, actual fact, or added bonus. Abundance means a large or excessive quantity, so "over" is superfluous.
As much as I love Stu, I find it rather superfluous to bring up the over use of such abundancy. What does he want to do? Be "dancy" around the use of a word we all use? He must have been the wall-flower girl at the dances.
I find it reasonable not to engage him or anyone else in the way I use grammar and/or punctuation. In the grand scheme of things it's meaningless in this casual forum we all call Answermug.