There's potential problems with that as well.
There's problems with literally everything I'm saying.
Crazy big energy requirements
Even that's an understatement. It's unfathomable what it would require.
the possible need for negative energy
I think it's a necessity, which, as you've said, is highly problematic. I'm not going to hand wave this with the Casimir Effect, there's still a long way to go before we can say it's possible.
the inside of the warp bubble being incinerated at Planck temperature* by Hawking radiation when superluminal
If we're able to detect the Object in any fashion beyond Hawking Radiation it suggests that the field is not a closed system (reaching to the Event Horizon) relative to our Universal standpoint. If it's not a closed system then heat can dissipate.
If it IS a closed system, relative to our Universe, that's only to say that it's a closed system to OUR Universe. But the nature of manipulating Spacetime would then suggest that the excess energy could be ejected "elsewhere". The act of closing a system and opening a system at this point would be one and the same. You would not be limited to manipulating only a single field. There are actually some very intriguing AAWSAP/AATIP documents about the potentials of this that I posted earlier in the thread. Since we're still on TOR and I should be in bed right now I'm not going to bother finding them at this moment but they're in here somewhere, I believe they were highlighted. There was even a suggestion in the documents that you could maintain a separate field to sustain biological life within the Craft. All speculation of course, and maybe a psyop, who knows.
there's the possibility that particles building up on the warp bubble during a trip would be released at the end of the journey in a "wave cannon" beam of destruction.
Spacetime should be
highly contracted in front of the Object, so friction and drag would not be anywhere close to conventional standards. That said there should be some amount of it regardless, and it would probably be wise to travel in "steps", mapping out a route with the least amount of friction each time.
Why word it as "the Object"?
This is actually just something I do often in my own personal notes and documents that I seemed to have carried over into how I post online. It might have something to do with my ADHD, I tend to go out of my way to capitalize certain core or critical words that are central to my train of thought. I think it just helps me orient myself.
