I have a planet about 2 Earth Radii large, and even at a lighter Density this puts it squarely in the 10 Earth Mass Range and about 2.5g. It's about 90% ocean, has a thick atmosphere, and near constant storms.
I don't need this to be a specifically human-habitable world, it's intended for big hexapodal aliens, however I would like to see if I can tweak the gravity to be more Earth comparable, somehow, like 1.25-1.5 g instead for more dynamic mountains/geological features, and ideally also megafauna and creatures that can fly.
Are there any (with some wiggle room) scientific ways I can lower the gravity/mass without compromising the planet's stability (making sure it has plate tectonics and oceans and weather etc.) - Highly improbable but possible is very much welcome.
Barring that, any absolutely wild sci fi concepts would be handy too.