Volume balancing HX patches - the sleazy way...
You can always go to the output block and turn the level up or down for each patch.
+1 to @chadhargis - Adjusting the output block is the easiest way to volume balance. Super easy, and no trickery going on.
I still have a tube DI as I love the nostalgia of it. I have a 1945 JAN NOS tube in it. It's just cool. I also have a tube amp...an Ampeg PF-50T. It's awesome too. But for a live gig, nothing is better than the Line6 gear.
I'm certainly not saying I don't want/need some kind of cool tube powered DI box. I've got a couple tube overdrives and a '74 V4B, so I'm on board with the idea stated in this thread many times that there's something special about the FEEL of tube gear. It's just that in addition to being quite happy with my HXS, option paralysis is also a thing for me. So many cool options, not sure which way to go. And I don't have the $$$$$ to try them all. Unfortunately, other things that need $$ priority always seem to keep popping up.

The Ampeg PF50T has been lingering at the top of my list for a long time and might be the direction I'd go first, since I also have a pair of PF115HE cabs as a backup rig. Using that amp as a "fancy tube powered DI something or other" in addition to being a poor man's B15 would be icing on the cake. lol
5sg.