do any such submission systems feature (basic) bloat detection? like go through all images, calculate bits per paper area, look at color histogram to detect if vector graphics, like plots or system diagrams or other drawings were submitted as raster images instead of vector graphics in order to prompt the submitter to ask if he still has the original vector graphics format, and then build lists of typical file formats which need converters to standard vector graphics formats etc?

i have no idea. You are asking for features that make sense for dead tree journals, but i dont think these should be relevant anymore.

I am very much against the "huge and stringest" requirements that journals have about formatting. It is a huge time waster for researchers and their students that offers next to zero benefit. About time we switch to HTML formatting & simple microdata for references.