There is no "easy" way to adjust it... that is, no way to adjust it without taking it apart.
It isn't too hard to take it apart and fool around with the parts inside, it's not as messy or "advanced" as I had first thought, give it a go!
I took mine apart day 1 to file the 50% detent down so it wasn't so...sticky. After that, I cleaned all the grease off of everything and placed a smooth/fine
piece of (loop or cloth part) velcro on one of the 2 throttle tension surfaces to prevent other... stickiness, which occurred while trying to make very minor adjustments.
Or you can simply stretch the spring out or replace it with a tougher spring... but may still result in that stiff or sticky feeling.
It worked (velcro), for the most part, but I was still having issues while docking (back and forth and back and forth), over-correcting the throttle. After searching for others
with this issue, I was directed to
Joystick Curve (link), a free project/program used to create a sort of digital "expo" and other tweaks (sensitivity, limit adjustment, dead spot)
to a joystick /hotas that doesn't have software to do that naturally. **Here's the video that was linked with the thread/post from somewhere else in these forums:
https://www.youtube.com/watch?v=CqzoJPCZM0w
The program works pretty good, haven't had any issues with it and I've been using it for about 2 months, no viruses, no net usages that I've seen, it requires a download (virtual joystick driver) or two,
and some messing around to find your desired settings.
*The purpose of the velcro was just to give some sort of surface friction <other> than 2 perfectly smooth surfaces with tend to grab each other, even with the grease. (I had even applied difft. greases to it...still no joy).
Adding the cloth velcro worked out ok, wish I could have found the peel-and-stick felt though, (for furniture/lamps and such).
I hope this helps! Just don't be afraid to take the throttle apart, it's not going to fall apart and break too easily, once you get it open... you'll very easily see how the tension is applied to the throttle.
(as far as the stick, if you should wonder, I've no clue how to make that less sticky, I have yet to get the cup/shoulder/socket thing apart

)