I think the answers to all your questions is "no," but you might try asking the Poser 12 forum.

If you're using PoserPro 12, there have been a lot of upgrades, but you can get most of them in Poser 11 (currently available again, for a few more days). Including La Femme and a bunch of other free content.

https://www.renderosity.com/article/23687/get-poser-11-for-9999-for-a-limited-time

Poser 12 uses a new version of Python (necessary because Python 2 reached its end of life). That means the old Python scripts no longer work unless they are upgraded. DAZ has indicated that DSON will not be fixed. So expect less Genesis compatibility, not more. And Poserfusion is no more.

There's a 21 day free trial. (Just download and install - if you decide to buy it, you can put in your serial. If not, it will stop working after 21 days.)

https://www.posersoftware.com/downloads