With the release of Capture One 12 you can upgrade from any previous version, so you can skip as many as you like.That's interesting that you found Capture One Pro to be foreign from what you were used to in Aperture. I actually found it to be quite similar, but that might be because I setup it to mimic my Aperture interface. See the attached screenshot. Try creating a Favorites tools panel in the editing tools column and add into it all of your most used Aperture type of adjustments.
I did this and spent the first six months like I owned an updated version of Aperture and didn't get any deeper into the color editing capabilities of Capture One Pro. Eventually I started to wander off of my "Aperture Favorites" tools cluster and little by little, I really came to love what I had in Capture One Pro.
The two things I loved the most about Aperture was the ease of catalog management and being able to make two or three simple slider adjustments to most photos to get it as I wanted it. I find Capture One Pro to be slightly less easy to use in both of these regards, but what you get in return is very sophisticated color and exposure editing that will allow you to make edits direct in Capture One Pro without having to send it to Photoshop or another program. So the basic edits take a little bit more time, but most of the advanced edits that used to take forever or not at all only take a modest amount of time.
One thing you'll want to be aware about with Capture One Pro though is that it's basically on a subscription basis. They come out with a new version about once a year and it's always a paid upgrade and you're only allowed to skip one version before you're not eligible for upgrade pricing. I expected that I'd buy one version and sit on it, but I've come to appreciate the new features so much that I've quickly upgraded when given the opportunity. I didn't expect to be using it so much. I don't mind paying a subscription for something I use all the time.
I'm interested in seeing that as well, but I'm a bit tempered in my expectations. Like you, I'm a programmer (if my memory serves me right) so I know very well that an easy to use and easy to administer cataloging tool that is also performant is very hard to do. Skylum has made more promises than it should have and has a lot of catching up to do. I'm not holding my breath in the near term, but would welcome having more options in the future should I tire of Capture One Pro's annual upgrades.