Geez, I dunno why people make this so hard.
All that needs to happen is the following simple 3-step plan:-
1) Nerf the Annie's integrity down to around, say, 250 with the standard hull.
2) Adjust the weight of the Reinforced alloy hull to, say, 200t and the integrity to +1,000.
3) Adjust the weight of the mil/mirrored/reactive hull to 400t and the integrity to +1,500.
That way, the Annie remains the uber-explorer for those who want to use it as such and nobody currently exploring in one gets stranded.
Fit a Reinforced Alloy hull and you get a big ship which is still fairly light but has good armour.
Fit a mil hull and you're back at the current level of integrity but with a sensible weight.
There's no need to over-think it.
Can't rep. Best way to keep explorers from getting stranded while reducing the range of combat setups. +1