Made it to the first reincarnation. It's pretty comfy and there is a good amount to play around with / try out. Looking forward to the 'lesser reincarnation' that allows you to swap out the base race/class, only because after the first reincarnation you get kind of locked in. Of course, that's just my analysis paralysis of hitting the first 'hard' locked choice.
It's cool having to experiment so I like that most things being non-permanent / reversable so you can. Base classes, though, seem to have different 'undocumented' side effects that you don't get if you pick them as a subclass. Apparently bard gcd, certain disciplines, etc. Also, since your base class is the only one that auto-scribes, doing something like ENC/ROG is better than going ROG/ENC, since the melee abilities come free anyway and ENC has a ton of spells.
Until the lesser remort is in, you stand to lose RP if you delete/replace characters in order to rebase them.