I enjoyed all of your clips with v30's most. It's a better speaker, period. I'm not going to sit here and argue about why, but I'll tell you that every recording on your page with a V30 is less cloudy, has more sheen, and is more pleasing to listen to.
Honestly, I've never been super impressed with a Diezel that I've played (a just retubed VH4 in the same room as my modded 5150 II was a no contest that the 5150 had more clarity, bite, and was actually less honky). I really want to try a Herbert, and I may have a shot in the future to try one to make clips for Diezel's site (I hope), so that would be super nice.
I think aside from that EV speaker, you need to take a break from playing/listening to guitars for a day or two, sit down with a good pair of headphones in front of your amp head with your eyes closed and tweak it. A big issue that people have is allowing numbers, positions, dials, to interfere with their ears and what tone ultimately rocks the most.
Use that Maxon OD 820 Pro in front of your Herbert, mess with the presence, mid cut section, gain, etc, mic it up with a v30 loaded cabinet, and see what happens.