Yeah, I actually did tests to try to find how many frames total 66A+BG is.
No matter how much advantage I gave to Raph off some block, and no matter how slow the subsequent attack I could find on 8wr's wiki, I *could not* get Raphael to interrupt that attack (with 6B) with a 66A+BG between his block and that attack.
66A+BG is completely, completely, completely worthless. It will be punished, or 66A+B would have hit.
On the 'worst move', BT B+K wouldn't be worthless if Raphael *had* BT 8B+K and BT 2B+K. And BT 4B+K, I guess is the notation. I cannot calmly recollect the times I've known I wanted a Cantarella Needle but *any* B+K input was overridden to a BT B+K that missed completely. Because they're not behind me, just in the back enough to mean my inputs are in BT position. >:(
The only sane explanation is that it was put in as a power limit on Raphael's Back Turned Vurkolak aGI.
What darkfender says about 2A+B is true. It's totally seeable, but it is faster than some expect, when you're using it to deny fancy stuff. And, as a low, it forces the rarity of TJ or the even rarer low aGI for any such fancy-stance stuff to beat it.
(And there's it's SG damage, forcing step as an answer if you get that flashing gauge.)
*~*~*~
Yeah, Prep K is there for one thing. Definitely, I'm happier it's there than not - as it *does* answer that 2A Stupid Button; but maybe if the 66B move was more usable to make its role in the combo more relevant...
I think though that Prep A holds Preparation back. So much of Prep is just revolving around Prep A. You either attack and get super CH combod off Prep A... or you... don't attack, and I shouldn't have prepped (and/because Prep options do not present a mixup). This is other than the situations where *nothing* in Prep works, because they have something faster than Prep A, so that's free.
Prep in older SCs was about Raph keeping pressure, but as someone coming to SC4 effectively fresh to Soul Calibur (I played SC2 before I knew of Fighter Games as competitive pastimes, before I read Sirlin), it's quite clear that Prep is just something to make 3B and the like safer. However, with SC4's actual numbers it's just a mitigation of those moves being extremely risky.
There's no reward in calling what the opponent will reply with after blocking a prep move, because it's just Prep A or nothing. If Prep A was safe on block, it'd be busted. If it tracked step, yeah that'd be nice, but it would just make Prep viable but still extremely simply simple over as its present state of step vs. punish.
If it meant the other moves could be upgraded to actually *answering* - beating in a profitable fashion to make the other guy scared to get predicted - their respective targets, I'd like to see Prep A changed very much so, for the weaker.
Perhaps tying in to something I said before (or maybe I decided against this post ^_^;), it's weird that Raphael has Prep A but his 6A is worse than that, despite the essence of prep being a set of moves Raphael can use from the 'off-balance' stance of keeping the momentum from some moves.
Prep A is what led Raph's meta and player's down the dead-end road of greed for SC4's first year (if I understand the archives right), trying to get that CH combo like it was meant to happen. Well it doesn't. It almost never should against an opponent who controls reward vs. Raph.
Last, prep needs to be put on the right moves that want to transition to prep. 66B's transition to prep makes no sense with its data. (Hopefully it's clear that what combos something enables is a circular kind of argument, if we're talking about the design stage of a game.) Maybe... 66A could go to prep? Man, imagine going to prep roughly on +0 with an opponent who ducks the approach and then modified for reaction. Right there. It's at least logical.
... I ... didn't intend to talk more about design (& SC5). I want to appreciate and use Raph as he is in SC4. I suppose understanding 'what-ifs' can frame the facts as they are, helpfully, though.
(why does this forum forget you're logged in after just ten minutes? >_<)