It would be great if the export came with an 'Analyze' button similar to the one described here for sharing layers to the web.
One use case: I learned the hard way that certain blend modes create myriad issues when exporting to both vector PDF and AIX - some layers flattened, entire data frames flattened, entire layouts flattened, entire data frames missing, layout graphics missing...took about a week of troubleshooting with technical support, and I wasn't tipped off to the problem with AIX until this comment. I let technical support know that the blend modes were the culprit, but I can't find documentation for this limitation on AIX or PDF exports anywhere. I've also had layout exports not open in Acrobat at all with no indication from ArcGIS Pro what was wrong.
An Analyze function could handily help users identify problems like this in their layouts and maps and save them hours of troubleshooting.