Indeed, the laziness problem can be quickly solved with a USB Pen with parted
live (or even Trisquel LiveCD) and resize everything. I personally never
trusted the idea of having the same /home directory when you have 2
distribution, one being rolling distribution (Parabola Gnu/Linux) and a
not-rolling distribution (Trisquel Gnu/Linux), don't know why xD
I never had a SSD so I never looked at this in details (always heard of the
ext2 being a solution here and there).
As for EXT4 being stable, I don't really know after an announce like this:
http://www.phoronix.com/scan.php?page=news_item&px=MTIxNDQ
and this
http://www.phoronix.com/scan.php?page=news_item&px=MTIxNTE
