Some beautiful speakers you have there - congrats!
I will pile on that the SF are just not pressurizing the room, which when you put it all together from your description, is quite large. Try walking around the room and stopping here and there. You should find places where you can actually 'feel' more bass peaks. I know my pretty large (long) basement room has much more bass (too much) along the sides and towards the back. Fortunately, the listening position gives me a good combo of punch and depth. If you don't feel the bass substantially more in certain places then I suspect it's a pressurization issue.
Sounds like you've tried moving them around as much as possible with little effect. Just leave the subs on and do your best to optimize everything. Then relax and enjoy your great setup!