They're making major changes and I think most of them are steps in the right direction. They're improving the feedback system by not letting sellers leave feed back for buyers. That eliminates retaliatory seller feedback and will give a more accurate picture of what the seller is really like. At the same time, they're taking stronger action against dishonest buyers.
They're lowering listing fees and raising final value fees. Some people will like that better, others won't.
The biggest controversy I've heard is that in some cases new sellers can have their Paypal funds held for 21 days. It's a fraud prevention effort to make sure the product is delivered, but it won't be popular.
As far as the boycott goes, I support anyone's right to boycott. But when somebody starts yammering about "big business monopolies" and lumps them in with Microsoft and Comcast, IMHO he's an idiot. No one forces anyone to use eBay. They're not a monopoly. If enough people get dissatisfied, someone will come along and offer something better and less expensive.