The issue of rolling shutter on the ES is over stated. IMO.
The ES on the IQ3100 is even longer as I recall, I used almost all the time. You will not see issues with movements in landscape images, unless there is a 20 mph or stronger wind blowing. It works fine also on the GFX. There are also issues with flash, as can be expected.
Yes, if you take a picture of a person moving, or a car, etc, the rolling shutter will show it's effect. But it's nothing as bad as many folks make out.
In over 2K (many more taken, just not proofed) frames with the 3100 all with ES enabled, I have only found maybe 10 frames that were effected enough to not use.
The upsides are well worth it, as it makes the XF and IQ back very stable now and use of telephoto lenses on tripod is much more reliable. Even with vibration reduction mode on, the XF IMO is plagued by mirror shock and shutter shock with any lenses longer than 100mm. The ES totally eliminates all of this.
You really have to try it and see, as the results will speak for themselves.
I have not seen the ES on the Hasselblad as far as images, but have used it on the GFX and X-T2 from Fuji and the IQ3100 and all have no issues for my landscape shots, (unless there is wind and a lot of it).
Paul Caldwell