1. There's nothing particularly bad about the new logo: it's the sort of moderately bland and inoffensive job that any graphic artist could cough out at a moment's notice, perhaps as part of a group of proposals to choose from, holding up the mild end of the scale, but not necessarily the best one. It's too bad that we're not likely to see the also-rans. A vote would have been interesting.
2. The older logo was definitely edgier. Years from now, people might be winning or losing bar bets over what it used to look like. (Pop quiz, without looking: Which letter of the current eBay logo is capitalized? Are you sure?)
3. The most common observation, and I would hope you could have seen this coming, is that it tempts all kinds of embarrassing backlash to give this revision the same kind of big publicity buildup as you award to really significant things, matters that actually have an impact on buyers and sellers, and it's that sort of undeserved importance that offends users of the site.

The bottom line here is that the revision was not needed, and does not solve any existing problem. If you want to change the logo, for heaven's sake just change it and be done with it. Giving it an entire discussion forum devoted to it begs the question of why more-important issues cannot be tackled on the same basis. Examples would include:

• the frustrations of dealing with clueless telephone-support people who do not appear to have any personal familiarity with buying and selling
• the problems of Chinese fakes swamping many categories
• the endless and unnecessary revisions of important pages (e.g. My eBay), coupled with pointless projects elsewhere (was anyone really in dire need of a new look for the My World pages?)
• the shaky programming quality of many eBay pages (e.g. why on earth is it technically impossible to put watched listings on the same My eBay page as sale listings? The old version of that page did it just fine.)
• the complete wall between eBay technical staff and eBay users that prevents any kind of forum and simple dialogue between the two groups

...and many other issues here needing to be addressed; those above are simply what popped into my head just now. You have a number of priorities and crises to address; this logo is not one of them.