Hi Kitty, Unfortunately I don’t have a date for you when the new version with editing a single box within a collage will be live. It is currently under development and I’ll keep you updated when it goes live. It unfortunately may not be for a couple of months, but you can edit photos individually and add them to the collage from your History by changing the dropdown from Get from Computer to History when building a collage.
Some of the Bokeh-style textures from Pixlr will make their way into Ribbet in the future. In the meantime you can enter Pixlr editing from the Pro tab under Pro Editor. I will also update you when we have more textures and effects like the ones you’ve mentioned.