I had high hopes for the mavens that came on my stumpy. like you I hate DOT fluid on bikes.Nope, they actually resolved that a few years ago. My issues:
- Too much modulation, If I have the lever where I can reach it comfortably I can pull the lever to bar and still not have enough power. If you have big hands, no issue i guess, but I like the on/off feel of shimano
- DOT fluid belongs on cars. I don't want to deal with it around carbon and degassing it is tedious and sucks (literally). The bleed process is way more complicated than the gravity bleed that takes about 2 minutes on a set of shimano brakes.
Surprisingly, I didn't hate the mavens I tried the other day when I demo'd a Stumpy 15... they were certainly better than the current DOT fluid offerings and I like that they are going mineral oil on the new stuff... but the levers were still much too stiff in the freestroke. May too much hand fatigue
My issue with the mavens was the massive amount of effort it takes to squeeze the lever. On Long descents I would get forearm pump and strain like you wouldn’t believe. It was seriously like using a grip master hand, strength trainer or something. And I mountain bike (well fat in the winter) close to seven days a week year-round and have for >40 years and I also rock climb. I would do the same ride on my Kona process that has four pot XT’s, no problems, same ride on my sons Trance X with Codes, no problems. I struggled with the mavens for three months trying to get him dialed in and working. With no luck.