Open office documents with a size of max 100MB
Allow office online to open files upto the size of 100MB (maybe in wifi connection or 3G)
Excel, Powerpoint can easily grow beyond 50MB with charts and images
Completely ditch opening files in office online. Simply allow the file to be downloaded with a link like dropbox. This is infuriating. If you want to compete with the other products out there you should at least be able to match their level of accessibility. Even if the link went to a web browser screen asking if you want to download the file or open it in office online, that would be sufficient.