to get that to combo, (currently) you need Nivana to do 2D before/at the same time you do j2C. (currently) Outside of starters, you probably don't have that situation, so its hard to say.
And since, if you're in allecan 5C situation, might as well go for volante/4D. J2C allecan 5C jB 2D might work, but probably will knock them too high for 2D to hit, might as well go for 8D.
Its hard to say if you'll ever even get into loop combos with the 3C changes, they gave it the back the CS float (so no more 3C jb jc 8d potential?) without the knockdown (so maybe you cant even do 3c j2c)...unless you go for 623C 2D/8D starter...