In these many "discussions" aboot these fine hitches, I have not heard much about what changes in trailer weight distribution does to hitch performance.
I have towed since 2003 with a Dual Cam HP on 2 different trailers, both have the water tank just above the front axle, and rear holding tanks. I have always set up the DC with full water tank, and have accepted the slight changes that occur when returning home with less FW and sometimes full holding tanks. Not to mention the loss of TV rear axle weight when a 44 gal tank is heading downhill.
For the DC to be perfect all the time, in every situation, and weight scenario is impossible unless you go out there and re-adjust the cams every time something changes the setup. I for one will not go through that, and my setup has always been reasonably close going and coming. I have never felt unsafe using my DC.
We boondock (dispersed camping) in the NW mountains, almost 100% of the time. Getting to our favorite sites will be on good 2 lane, freeway, on dirt & rock forest roads, in rain (and snow at times), wind, truck traffic, etc, and the DC has done its job so far. Will be going back east for 3-4 weeks this summer, and I don't feel we will have any sway problems.
For this simple reason, maybe those that have "difficulty" adjusting the DC, who may have a long TT with long overhangs that affect the tongue weight severely, should use a different hitch. Also, a lot of people just tow empty to and from their "campgrounds" and only have that one setup and load to adjust for.
Yes the DC is finicky on setup, but not impossible. I have never used an Equilizer, so can't comment on its performance or ease of use.