PMDs in 4.5 is better than it was in 4.0, but it’s still not anywhere close to 100%.
Some of the figure items I had with PMDs that did not work in 4.0 are working now in 4.5. The two problems I had in 4.0 (depending on content item) were:
1) It wouldn’t appear to link the morph controls to the actual morph data, so moving the slider in the Parameters tab did nothing
2) PMD morphs would cause the item to explode (vertices going everywhere but where they should)
For figures, most of the stuff affected by problem 1 seem to be working now in 4.5 (e.g., some of the older stuff from 3D-Age over at Renderosity). For item 2, some of the items that used to cause explosion now work, but others do not and still explode (like Exnem’s Armored Witch).
Every single PMD prop I have (fortunately not many) suffered from problem 1, so I don’t know if any of them also suffered from problem 2. However, in 4.5, despite the one release note entry I saw that said they had ‘fixed PMDs for props’, all my PMD-based prop items are still exhibiting problem 1.