I thoroughly enjoyed the first 4 seasons of Johnny Test, so all the revival needed to do was improve on seasons 5 and 6 (which isn't hard to do). And I'm glad to say that they did this revival so well to the point where I think this is slightly better than the original Johnny Test.
I would rate the OG somewhere in the high 7's to low 8's, but this new Netflix revival I would rate somewhere in the mid 8's.
The animation's got an upgrade, the characters aren't flanderized to oblivion, the jokes are even funnier, the whip cracks rarely show up (they even made fun of the whip cracks), and the show maintained the silly charm it had during the good seasons of the original.
I highly recommend you got out of your way and watch the new Johnny Test. It's such an easy watch and it can distract you from the stressful things going on in your life.