How could or should the 6.5 mm Grendel be improved?

[stanc]

I would think that the goal of a GPC is "an ammunition that matches 7.62 mm NATO ballistics at 1,000 metres in a package that is 30% lighter. The 6.5 mm Grendel does this, but not as completely as we would like. Put a bit of extra power behind a slightly lighter projectile and you have a truly impressive round that is as lethal at 0 metres as it is at 1,000 metres.

That is extremely unlikely.

I would hope that the specs include a G7 bullet rather than the G1 type.

G1 and G7 do not refer to bullet type.