As sombody who currently owns the an MWS, ACC and a Scar, I can offer my opinion on the matter, but it is only an opinion and depending on what you are looking for in a rifle it may or may not be the best options
<cut for brevity>
Wow, great to see an objective post with actual observations.
Almost exactly my observations with them.
ACC is probably the standout SR25 as it is a heavy carbine that handles like a 5.56. It really excels in that role (as well as reliably cycling suppressed/unsuppressed without any adjustable blocks or tuning) but can be pressed into doing a lot of other things reasonably well.
It will turn in some good groups, but it is important to not fall into the expectation that it is a precision rifle akin to JP, Seekins, LT OBR/tOBR, etc. It was never meant to do that. It was meant to have very long component life, high reliability, and function with/without a suppressor.
In intended use, an ACC is closer to a SCAR17, compared to which it is pretty great.
If you want a tiny-group precision rifle, probably others that will do it better/cheaper than an SR25