To be fair and honest, I should report a 100% acceptance at CanStockPhoto from a batch of 10 last weekend. I was a test batch after a long time with a mix of just OK and good images, your typical batch and not selected for "best".
After the flood of unjust rejection posts here, CanStockPhoto probably reconsidered their rejection criteria. But it's too early to tell.
As to the "changes", CanStockPhoto will mollify its stance about the 15 keyword limit, according to a post of Duncan, and as a result of the vote on CanStockPhoto. All keywords will be used in the search algorithm, with an emphasis on the first 15. Me thinks that's a productive compromise, and as far as I know, also the politic of Fotolia (with 7 keywords).