I thought John Donahoe claimed he was joining the PayPal board after the split and not eBay because he wanted eBay's new CEO to be able to run things his way.

This sure sounds like parting instructions - interference to me.

Under John Donahoe eBay has been one disruption after another and the vast majority of these disruptions have been a failure with buyers or sellers or even both at once. The net result of all that disruption is that Donahoe now passes on a marketplace which can not grow sales volume consistent with the rest of the ecommerce industry.

In other words, the Donahoe disruption era at eBay has been a huge failure to the point that PayPal must now be ejected from the eBay umbrella to avoid the payments business from being dragged down by the failing marketplace.