I do not know which bike you have.
I have run 2.0 (or 50mm) width Dureme on front and 2.0 width Extreme on back on my Sherpa. I think a 2.25 (or 57mm) width Extreme on front of the Sherpa would not have much clearance at the fork crown if you run fenders. So, if you have a Sherpa, be forewarned.
I however find that the 2.25 (or 57mm) width Extremes on both front and rear of my Nomad Mk II to be great. I am not sure what the complaints were, but I can say that the tires roll very nicely, they do not feel slow at all. They are quite supple compared to what I would have expected for that tread. But they are very noisy on pavement. (The 2.0 width Extreme on my Sherpa are also noisy on pavement.)
If I recall correctly, I think Andy Blance commented in a Thorn brochure that the 57mm width Extreme tended to roll out from under the Andra 30 rim at low pressure in corners. I think Andy suggested a thick wall inner tube to reduce the potential for that. I have not had this problem myself and I have the Andra 30 rims on my Nomad. But I was surprised when I received the Andra 30 rims, as they were narrower than I expected for an "expedition" rim. Perhaps Andy is more aggressive in cornering than I am? I am running Salsa Gordo rims on my Sherpa, they are a wider rim and I think a wider rim like that would handle a 2.25 inch wide tire better than the Andra 30. If the complaints you cite are the rolling out from under the rim at low pressure on an Andra 30 on cornering - that would likely be a problem with any wide supple tire, not just the Extremes.
The Extremes have been discontinued for a while now, but I bought two more a few months ago when I found someone had them at a very good sale price. I like them a lot, that is why I bought two more to keep in storage for when I might need them. And at the rate I am wearing out tires, it will be many years before I need them.
My Nomad Mk II with the 57mm wide Extremes in the photo. For this trip, I was using an suspension fork and a suspension seatpost, it was a vehicle supported trip where a 4X4 truck hauled our food, water and camping gear for a four day off-road adventure, everyone else in the group of ten used a full suspension mountain bike, but I wanted to find out how my Nomad would handle such conditions, thus that is the bike I used on that trip.