It's your experience against what we are seeing in a video. Also, wether you find wobbly pots a non-issue it's up to you. Personally I have only seen Ciani's Buchla system up close, and never touched one, but if I were to buy one and got wobbly pots, I would be even more inclined to get a replacement, given the price. I find much more reasurring and indicative of good craftsmanship and quality sturdy pots and knobs found in Doepfer's and Frap Tools' modules, for example. But again, it's my opinion.
-- Fruarse
The wobbly pots on the Buchla are not a defect. Just look at some photos of their modules on Schneidersladen, all of the potentiometers are PCB mounted, so they will wobble. Sure, there are manufacturers who have better build quality, but it's not like Behringer is the only one who uses PCB mounted potentiometers. Some of my Bastl modules also have the same pots and I haven't seen anyone complain about their build quality even though they were more expensive than any Behringer module.
I find the ethical concerns about cloning less clear cut when it is common practice in eurorack to clone or directly borrow ideas from other manufacturers. And given how many people recently gave up eurorack I don't think it's bad that there are cheap gateway modules that reel in people into the hobby. Most Behringer modules will be replaced eventually in people's racks as they take up too much space and offer little utility.