I like the look of the new features. To be honest I'm not a big user of the web client (mainly because of the ads) but am generally quite happy with the service.
I look forward to ActiveSync so I can connect with my iPhone.
I have an issue with the Outlook Connector though, it does not allow you to send mails on behalf of other accounts even those this can be achieved via the web client or Windows Live Mail Desktop.
It would also be good if there was a DeltaSync connector or some other way to sync with other mail clients such as Apple Mail as POP is really insufficient in the modern era.