I love my Isabell for trail and endurance riding. Mine has over 1000 miles on it, all trails up North. I took the blocks out (they are Velcro) and shorten my stirrups about two holes from where I ride Dressage. For how I’m built, that works. The old Isabel doesn’t have the super deep seat of some saddles, but I find it very secure. It’s not terribly tough to get into a solid two point, and I do a lot of that when I’m conditioning.
I don’t really ride western, and I find a lot of western and endurance-style saddles feel bulky to me. To me. I just don’t have the western background to make that my preference, to me a dressage saddle feels supportive and comfy. My horse is also easy to fit for a dressage saddle, finding western-style trees for him is quite challenging. Possible, and his old owner had one…i liked it, but honestly it felt “sloppy” to me, because there was more room in the seat… If that makes sense. My dressage saddle is just more snug without the bulk.
Anyway, I know several endurance riders, FEI level, who love their Dressage saddles too. Try some out! Remember too that you can change the blocks on some of them, relatively inexpensively.