I can't see why they would make it any softer or worse than the last gen RX-7. I don't think the purpose of this car is to take a step backwards.
I'm planning on it being a very solid handler. As for guesses on swaybar sizes, that could be anything...I mean, each different car and suspension set will have a different width sway bar which will provide different resistances. In some cars, it's possible for a 22mm sway bar to be softer than others with a 19mm...so there's no telling.
As for the springs and struts. Well, I personally prefer spring rates above 300lb/in and general go-kart like driveability...but I don't think I'll be so lucky