I'm not really sure what you mean by "use the redt of the drive safely". FFS is really stable and you can make as many partitions as you like. FFS can handle up to 127 GB.
The smallest SATA drive I found in my pile of parts was 250GB and the installer defaulted to a 2GB and a 127GB partition, leaving the rest unused.
I know that on real Amigas, you can lose data if you exceed the limitations of the controller, driver or filesystem so I left it at that.
Can I add another partition without losing data?
What filesystems work best with MorphOS?
Can I use a larger drive and if so, how big can it handle?
What are the limitations on the size of files? I work in video, so I've got single video files my home NAS that are over 40GB each and might want to play one some day.
I would recommend though that you make your system drive a little bigger. Like 10 GB just in case. I myself have 50 GB, but that's because I like to have my programs in my SYS drive. It let the HDD not having to jump around all the time.
2GB did seem a little small, but it suggested 2GB unless you knew what you were doing. I didn't

Pach Chrysalis is the same as Pack Ultimate. I like it a lot, even if it's not always reliable. But you also need to get Grunch. It's probably the most important program for MorphOS there is 
Grunch is that package manager you mentioned in your blog, right? That did seem like a nice thing to have.
How is it not always reliable?
Thanks,
John