Update on my replenishment - things have been going rather well so far! I'm up to 22 sheets of 4x5, 5 rolls of 120, and 8 rolls of 35mm (our ~ 19 rolls of film). I started replenishing for the last six dev cycles (whereas previously I was just reusing without replenishment to help speed along the seasoning). It seems like things are settling down but I'm still playing around with the X-Rite 334 to see if it'll replace my old method of using my enlarger. It looks like for process control it'll work but need to dial in the exposure a bit better.
The one issue I did run into this evening was this:
So that's kinda uhm, gross

This happened with my Xtol-R before too, although it wasn't quite as sewage brown I did have a similar experience if I stirred up the jug of replenished solution too much. I discovered this while doing my replenishment step. I add the 80ml first, then fill the 2L glass jug until it just overflows. This time I noticed some particulates in it, held it up to the light and saw quite a lot. So I opted to pour the whole thing out and filter it with my wire mesh funnel.
I tested the developer using a clip test and it still works (I had no issues developing the Fomapan 200 this evening either). So I suspect it's just sediment of some sort (which as noted I did get with Xtol-R too) but it did give me a mild freak out. So the next round of developing I'll see if it pours out clear and if stuff has settled down to the bottom. I also probably won't develop anything important for the next run just to be sure all seems well.
I have been developing quite a bit of Fomapan 200 (4x5) and while I do a pre-wash, not all of that blue/green tint seems to come out and some ends up in the developer, so that could perhaps be playing a roll for the color maybe, but that's just a guess.
Apart from that, my dev times by eye seem to be pretty spot on and are getting to be pretty stable so far.