I like what Bob Barrows did on designing the Bearhawk LSA. Build it LSA or make the GW at 1500 lbs per his max designed GW.It could be a fun little plane, but for a 2 place, the published 436 lb useful load will hurt it in the marketplace. Two people with clothes, headsets, maybe a toothbrush for an overnight trip, and there's not much weight left for fuel to feed that 100 HP Rotax.
The present MTOW is given as 1058 lb, so plenty of room below the present LSA max weight. If they can find a safe way to carry 50-75 lbs more, it could be a more practical (and popular) plane.
Next, find a way to power it with something less dear than a Rotax 912ULS and sell a lot more of them. The RV-12 (912ULS stock powerplant) has been successfully powered by a Suzuki (Aeromomentum) AM15, so there's that.
On the JMR, I designed it for ultimate of 10.1 g's , for a rating of 6,3 g's at a GW of 1100 lbs. So there is room for a little increase in GW. Don't know where you would put the increase is weight. As designed , you can have full fuel and pilot of 300 lbs and no baggage , or baggage weight that reduces the pilot weight the same amount with a max baggage weight of 50bs. All well within the CG envelope.