First of all, welcome back to the dirt.

I don't own a pure fat bike but I do have a 27.5+. I have also rented a pure fat bike (rigid) and have opinions. 43, big ole rider who does enjoy some technical gnarly riding from time to time, so my opinion is biased. So enough with pre warning.

I hated every second of my pure rigid fat tire experience. I couldn't get the bike to track well, I couldn't get it to lay down in turns and I did not notice any "cush" in the large tires, I dreaded going fast over anything bumpier than a root. That said, I am an agnostic in all things, so I can understand their use and appeal. I would buy one as a special use bike, but my wrists could not take the rigid fork. I was in agony for days. I would also, absolutely... require, hydraulic brakes and a dropper post. The three of those things would have made my fat tire experience far more enjoyable I am sure.

I ride a full sus 27.5+ bike. 2018 Trek fuel ex 8. The caveat being "back in my day, these dang fangled plus size tires were just called tires" so the 2.8 size is what I always rode when I lived in Whistler. So I don't consider them big. I find the normal width tires of today to be more akin to pinners (seriously, 2.3... jeez louis). Regardless, I love the plus size tire range. They do slow me down a bit compared to a big ole 29er, but the overall.. plushness (think really wet, muddy, root terrain, and needing to run at 15psi for any traction) and size are very appealing. Again, same rule as above. I can't live without a sus fork, hydro brakes and a dropper seatpost.

So all of my experiences said, and compared to your needs, renders most of my points kind of useless. However if you have been riding a touring bike successfully, and just want something that may be a little more rugged than a good fatty should do you fine. I would still stick to my hydro brakes and dropper seatpost comments. The larger tires will help roll over anything, but I am not convinced in their plushness as a substitute for suspension, I didn't notice it.