These arent real resets, they are just mix ups and pressure strings. Well the weird thing is about the "reset". You said it only works with low block, why would your opponent (real player) block low after that combo against reptile anyway? 90% of the time, you shouldnt block low against reptile at all if you are a decent player. And Im not sure about 1221 ending in the corner, you lose that corner position, sure you can get that fb out which is nice. But if someone is in the corner, theres a chance to read the wake up and do another ~45% or keep pressuring in the corner and read with NJP for jump out.
End with EX slide not sure is a good idea either, you lose 1 meter and if your opponent roll you dont get that dash mix up, but the good thing is when your opponent tech roll and you dash you are in your opponent's face but theres no advantage. Not sure if that worth 1 meter.
And I have to agree with Reptile_8417 on this one, nothing here is actually new; we have been all using these mix ups with different variations.