Yahoo hasn't done much justice to their past buyouts. I feel like this going to be a waste.
Yahoo isn't doing much for their existing products. They should really focus on what they have. No doubt the apps and all have been updated but desktop UI still remains same. No consistency in UI across different products.
The new ymail still isn't that great.
Another thing is why can't yahoo come out with own such product - they do have some brilliant engineers.