strikeshield

Hi Christian,
Welcome to Affinity Forums :)
There will be a desktop publishing app in Affinity's line called Affinity Publisher, but like the rest of the programs in the suite it's not related in any way to the Serif Plus line. It a new software coded from scratch.
PagePlus is now considered a legacy product and will only receive critical bug fixes. It's not being developed anymore but it's still a competent product and available at a reduced price.

Hi strikeshield,
Welcome to Affinity Forums :) Thanks for your feedback.
Bleed Preview is coming in a future version/update. Regarding the second point you can change this for regular (non artboard) documents going to menu View ▸ View Mode and unchecking Clip to Canvas. For artboard based documents you can move the object freely to the canvas area and they still remain visible. Objects crossing the boundaries of the artboard are only visible inside the artboard area. Currently there's no way to change this. Feel free to add it to the Features Requests section if you find it useful.