Suggest you purchase additional weights and try them as everybody responds differently to head and total club weight.

It is more of an individual response than technical results. A heavier weight might move some MOI further front. That may decrease spin. Shaft and loft settings will likely have a greater impact on launch and spin.
I have a GT-1 and it felt too light. Experimented with lead tape prior to purchasing rear weights. Putting 4 g back near the weight caused too much ballooning. Ended up keeping the lead tape (2x2g) closer to balanced positions. Upping the rear weights would not have worked. Lead tape allows more flexibility in trial and area for less money.