actually, im not sure its clear what 2.0 even is. i thought we were calling 3.0 2.0 at first.
anyway, i call 2.0 the potential release that tarek did right before he got let go and which was basically patched by seble (seble's finest hour, IMO).
seble also did a major rewrite later, and there was some blowback there but it was comparatively mild in actual changes. mostly he was rewriting to 'pave the way for future enhancements', not really changing that much. he did do a few things, that might have been when he balanced press, maybe even when he added feedback? or feedback might have been later, i don't recall. there was a brief month or two where all the sudden mediocre bigs were shooting north of 60%, but seble rolled that one back pretty quickly, other than that i think the re-write was mostly no big deal.
i guess i wonder if that rewrite is 2.0 to some folks? its hard for me to keep straight at this point, and you've been here 5 years longer than me or something.