The wells are to the side of the primary power generator and main engine, they are directly in place of where the port and starboard subsidiary reactors and engines are for the port and starboard thrusters, you can no more decide to move those than you can decide that the wheels on a car would be more effective if they were located on the roof.
AFAIK no cross section exists for a Interdictor, but given that the Interdictors are listed as having four gravity well generators but we can see eight hemisphere protrusions on the top and bottom of the ships its easy to infer that the system takes up the entire height of the hull at those locations.
Ok, so you now have to install a completely new engine system to retrofit an existing Star Destroyer with an interdictor system. What exactly was the point you were trying to make again? That fitting an interdictor system into a existing Star Destroyer would be cheap?Are you implying Interdictors have no engine? Maybe they replaced that huge engine with a smaller one. Do you even know?
The only reason that A-wing caused damage was because the deflector shields were already taken out, the A-wing was just a big missile at that point. At the speed of light you wouldn't need to hit the bridge to cause damage, anything moving at the speed is going to cause devastation. Good luck shooting down a ship that travelling towards you at light speed, or picking out the small ship at long range that's getting into position to make a lightspeed ramming attack amongst everything else happening on the battlefield.A droid can easily maneuver an A-wing right into the viewport of the bridge. For a ship to hyperspace through a capital ship - it needs to fly straight at it - i.e. it will be shot down. And I doubt the effect of the hyperjump of a small craft can do any serious damage to the capital ship - unless it's aimed at the bridge, which is very hard to do from afar because the capital ship is not stationary.
The only reason that they had time was because to react was because she had to do a 180 to line up with them.Remember the reaction of the Hux and other officers when they realized what Holdo was doing? They wanted to destroy it but since they were focused on the transports they had no time to retarget their fire. But if they could they would've shot down Holdo before she made the jump - the jump does take some time to spool the hyperdrive, she also needed to bypass safety protocols.
It mimics a gravity well in a localized area, it doesn't span thousands of miles. Watch Zero Hour, Thrawn's fleet is spread out across maybe 20 kilometers, the loss of an interdictor on one flank allowed Ezra, who was on that flank, to jump to lightspeed because he was out of range of the interdictor on the opposite flank. Also, thanks to Disney canon playing fast and loose with hyperspace in favor of spectacle the gravity wells of planetary bodies aren't even strong enough to prevent hyperspace jumps(See TFA, TRoS, Rogue One).What are you talking about? The range of interdictors must be several thousand miles. If not dozens. Do you even know how it works? It creates a gravity well to mimic a PLANET. Planets are dozens of thousands of miles wide, at the very least.
Just think about it - what use is of Interdictor that can only cover under 100km considering that each SD is at least a mile long and the need to spread out? 100km is nothing in space. It wouldn't even work with that small of a range. Since there's no actual data in canon on its range - we are gonna refer to common sense. A single interdictor can cover a fleet that can fit into a small moon. 4 interdictors can cover any reasonably sized fleet, spread as wide as need be.
You only lose your ship after an effective use, and as we've seen an effective use causes drastically asymmetrical damages. You are literally arguing against the existence of missiles at this point because you only get a single use out of each one.But you don't lose interdictor after use. Interdictors are cheaper that way. No one in their right mind will invest in hyperdrive weapons when there are interdictors. Case closed.
How does weaponizing a hyperdrive preclude you from being able to use other weapons?What fear? You have interdictors. IF your enemy has hyperdrive weapons - it's their only weapon - you can use a single tactic to obliterate them. Interdictors, tight fleet, focus fire. That's it. It's the best tactic against hyperdrive weapons - so there's no need for any other tactic. It's in no way a limitation.