@crosstalk I went ahead and tested D4 on block to see if it's worth the additional grind in execution, results were satisfying.
D4SKRC serves a similar to F3(4)RC, +4 on block which gives a free D1 check, get them to respect that and go straight into F3(4)RC, 11 or F24SKRC. I find that 11 is the most useful follow up since the other two options will use up your stamina bar and you can go into standard Johnny pressure.
Potato quality video showing D4SKRC on block (note, Kotal's D3 starts up in 7 frames).
Also started messing around with Flip Kick in corner combos and my god does it look awesome (also gains more meter). Made a little video showing a practical corner combo and impractical swag combo.
Also to finish my late night session with Juanito Jaula, I checked to see how much advantage your at after a 114SKRC. Sadly I couldn't figure out the exact number, but it's probably something ridiculous like +20 because your able to whiff the first part of 11 and they still get jailed into the string.
So in theory we could do F2SKRC > 114SKRC > 114 and it would all be a true blockstring, so yeah, JC pressure is gonna be nuts.