The PDF Tools (the mark up tool, bookmark and annotation tabs) worked extremely well before the latest update. The upgrade has removed a lot of the functionality that existed - a moveable tool bar, easy to find pages that were either bookmarked or annotated, the ability to draw straight lines with ease, etc.
The current pdf viewer and tools seem to be retrograde and make the process of working on pdfs MUCH slower.
Zaid Alalawi commented
Even the pen writing was better. Now it looks as If my hand is shaking because the app does not enhance had written words just like other note apps.