I'm a big fan of the camera roll upload feature of the one drive app. However, when scrolling through photos it takes a frustratingly long time for the thumbnails to load, and I spend a lot of time staring at blank squares. Having the ability to store thumbnails on the phone or to quickly download smaller-sized thumbnails would make file-browsing significantly easier.
Almost 160mbps and still extremely slow onedrive photo loading!
You are right very slow indeed!