Please read this post and don't ruin a part of the game I enjoy.
The Hulk has two issues
1.) The ore hold is to small. When ice harvesters cycle, there is not enough room in the hold one strip miner will shut off. This means that every cycle you will have to restart one and move your ice out. That alone would make the ship useless next to the new Makinaw. You need to at least double the size.
When I'm mining roids I get one cycle. That's insane, and yes I fly with a Orca so every cycle I need to move the ore out?
2.) The bonuses compared to the Makinaw brings into question why would I bother using this ship for an 20% difference in yield? I would trade the convenience of afk Mining with a Makinaw any day of the week.
The Ore hold needs to be at least 12K m3. Even with the mining bonuses retained, compared to the other exhumers the new Hulk is questionable at best.
Please don't ruin my hulk.
The Makinaw
Love the concept but you should extend the middle section of the ship to reflect the extremely large ore hold. Now I know the art guys love to do more then what is required and will want to redesign the whole ship but don't let them, because it will take them a year to get around to a full redesign. :-)
Skiff
I get the concept, but the logistics of low sec ninja mining are simply not very profitable. The transit times between the belt and station reduce the ISK per hour to the point that I can't see why I would even bother. Not to mention the risk in getting the ore back to high sec for sale. So unless you planning on anding a complimentary ore hauler with cloaking or other equivalent defensive attributes to the ship inventory your not providing a real use for this ship.
Well one out off three ain't bad. I'll finish with one final thought. Mining just became viable again, after several years of 2 isk veld pricing, don't screw it up. CCP has a very long track record of taking far to long to rebalance something after its been introduced. Drone region ring a bell?