Here is the announcement detailing the decision to stop developing Photoshop Touch: Photoshop Touch Announcement. It may address your questions.
In case you need assistance with specifics, I am moving this discussion to the Photoshop Touch for Tablet forum, where the community experts are best equipped to help.
I don't recall the workflow ever changing with PS Touch and I've been a user since version 1.0.
There's the project selection workspace (where one always begins) and the edit workspace. At the project selection workspace, you could always import an image off the bat for use immediately in the edit workspace, where then you could save this project back out in the project selection workspace (possibly as a template or a springboard for other projects).