Digital has moved the onus onto me. I have to worry about color profiles, I have to do the post processing myself because there's no way for me to have the lab just match an original because there's no original per se. What I see on the screen may not be what they see. So I have to make adjustments and just have the lab print them straight. That takes a lot of my time, which I would rather not spend at the computer. There's also a steep learning curve and modifying color profiles is beyond my capabilities at the moment. Quite frankly, I don't look forward to learning how to do that.
I feel your pain. It's a love-hate relationship for me. My software engineer persona loves the challenge in making the software and going in deep on camera color. My photographer persona hates it, I just want to shoot, I have enough of computers in my life already.
And indeed we haven't mentioned this so far I think, but medium format does have an advantage in that it's a more complete integrated package end-to-end regarding color. The color profiles are very well-designed, while many feel that for DSLRs etc you need to make your own color profiles to get the most out of the camera.
I prefer making my own color profiles also for medium format gear as I often don't agree with the type of subjectivity they have, plus that making my own profiles gives me more freedom as I'm not as locked in to a certain brand's look.
However if I would not make my own profiles the case for medium format would be stronger as I think they often have superior color, especially if you compare to a jack-of-all-trades raw converter like Lightroom. Native colors of the manufacturers own software (Canon/Nikon etc) is often good, but few uses them as they aren't as convenient to use as say Lightroom.
I'm personally not particularly fond of Phase One's color (what's up with that yellow cast, and why do they make their look differ so much between backs?), but I can't deny that their profiles are very well designed so if you like their subjectivity it's a hit, very solid profiles. I like the approach of Hasselblad which has highly realistic colors, less subjectivity than Phase One, and they also try to keep the same look across their products so you can switch back model without getting a different look, which I'd think would be a key feature for professional photography. Hasselblad also have the approach to have only a single look, not a bunch of different looks like Leaf for example. It's a matter of taste if you like that or not, I actually like it.
One strange thing with Hassy backs though, I don't know if it counts for H5D, is that the color on the back screen is radically different from the color out of Phocus. Colors are much warmer on the back screen. It doesn't really matter in practical photography but if one gets an occassional peek on a Hassy camera it's good to know.
If you like to have a bit more subjectivity, I'd suggest to look into Leaf looks. Leaf is today Phase One's "budget brand", but the truth is that they're still a competing alternative when it comes how to interpret color. They have a distinctly different look and many prefer their look over Phase One, so it's not always a budget choice to go for Leaf.
I have no experience of how Leica deals with color so I can't comment on that. When it comes to Pentax 645z the profiles I made for them using my own software has become quite popular as the color you get from Lightroom defaults is pretty mediocre (although highly robust).
If you're into reproduction work there's also finished packages end-to-end so you don't need to mess with color profiles yourself. Capture One has their heritage edition with reproduction style profiles, and Sinar has very advanced multi-filter solution (Sinar CTM) if you like that. And there's multishot (Sinar/Hassy). Reproduction work with smaller format usually requires more expertise to make your own end-to-end chain.
In all, medium format has very well-developed workflows for typical professional tasks in their genre. Canon/Nikon DSLR is more geared towards the needs of photojournalism, wildlife and sports of course, and Sony is, well, consumer-like. The best now reaches a fair bit into medium format space, and you know already that I think the gap is now very small (and to some extent surpassed if you use older MF gear) for practical uses, but I think that you still may need to work a bit harder to get the workflows and looks where you want them if your taste is "medium format like".