Odd comment about about TI vs B/C not addingh much - erm the TI adds a vast new sonic palette over the B and C.
B is VA + some fx, C is VA another filter and more fx options
TI OS 1.0 added hypersaw (C should really have had this oh well...), unrestricted combos of fx, proper sweepable wavetables
OS 2.x then adds PWM wavetables - basically adds fat ass wave table sounds to the wavetables in OS1
Then add the various granular modes and your in a completely new synthesiser sound wise - atomizer still hasnt quite fittted in for me yet, though very cool.
The one downer was loosing some fx routing options - bring back the aux bus!!
On the total integration - TBH what that adds to sound editing and patch management just makes everything else a complete pain in the backside to use by comparison. and then there little things like not having to worry about calibrating audio/midi alignments according to what mood everything is in on a given day and whether or not im using arps/seq mods etc.
I have a few issues with some design choices of course, but there are huge benefits overall and wouldnt be without it.