I have the Mk II gladiator with the Kosmosima upgrade, so I had to take mine apart to put the new handle on before I could even use it... and then took it apart for the re-grease a few months later. It's working fine since then.. truthfully, the hardest part was getting di-electric grease. About a year of hard use ?
I get what you're saying, that a $150+ joystick should work "out of the box", and truthfully, it should. But as an example, I had to adjust the new out of box aftermarket $1800 heads on my LS motor. I added stiffer springs, port matched the intake, and had the valve seats re-cut by my local machinist so they were perfect. Expensive heads.. but my motor is ( or will be soon ) a unique highly tuned machine. So some adjustment to a custom highly tunable device is acceptable to me. Your joystick WORKS.. just not as well as you'd like.. much like the heads on my car.
I had an issue with my VKB out of the box as well, and the VKB forums were...as you say, snobby. One button on the handle was stuck "on". But I did manage to reach someone at VKB that was very knowledgeable ( even down to walking me thru pin-out testing ), we found the issue, and I got parts in the mail a few days later. Warthog and Virpil owners also have their devices apart on occasion. These are small batch devices, for techno-fetishists, and I accept that as part of the "boutique" experience.
Again, I get what you're saying. That sticking will eventually drive you crazy if it bothers you that much. You're stuck between returning them, or attempting a fix with the risk of being unable to back out. Personally, I'd plug them in and run them for a week or so.. see if it's really a big deal to you in use. They MIGHT get better ( as some have said ), or you might find you don't feel it in game. If they don't you can make the call next week.