Humm, care to elaborate on this?
Well there exists something called "hitstun deterioration" though in this game its more akin to "gravity effect". Basically moves begin to lose on-hit advantage the longer the juggle goes on, hence why someone like Lex can't loop standing 11 more than a few times. The advantage on each 11 drops a little bit each time.
Taking that into consideration, it would be possible to make a string that uses such mechanics at its end in order to create a pseudo-fast stand. That is, the advantage you'd normally receive on a knockdown is so reduced the opponent stands faster. Using d.2 is a solid way to implement this as it causes dramatic scaling on both damage and hitstun, though its advisible to use it at the end of a string to allow for the maximum output. For example...
Something like b.13xxMB vacuum into b.3 j.2 d.2 f.2 would create a similar effect I'd think from midscreen.
As a more obvious example, try doing 22 d.1 as a normal knockdown. Lex gets about 1 and a half, maybe 2 dashes out of it from the time the move ends to the time they stand again.
Now do it off of something like b.13xxMB vacuum b.3 j.2 22 d.1, and notice you can only get 1 dash at the maximum before they stand. As you can see, the height they bounce is considerably lower and thus their time inbetween hit and standing is shorter as well.
