I have a very similar earlier model called the GT Air which can still be found in limited sizes. I've had this jacket for years and it's great for mid temps, but not as good as an Aerostich (with layers) in really cold weather or a full mesh jacket in 100+ temps. It does however work well for a broad range of temps and with the padding removed, I too use it for dual sport riding with a pressure suit underneath. Minus the hydration pack, front patch pockets, rabbit pouch on the back and a somewhat shorter length, the GT Air is basically the same jacket available at a deep discount. Great jacket and quality construction especially if you can find one of these in your size. Good review and your findings are consistent with what I've experienced with mine.
https://www.motorcyclecloseouts.com/insanity/9549