yes: bubble universes are an essential part of it, but the stresses on the bubble mount in a square of the prime Fibonacci Series the closer to the Vertex it approaches.
shorth runs (here to Proxima, say) would spawn a few radicals per molar quantity. no big deal.
longer runs, however...
Using a hyper-dense "warp packet" as a weapon is SUPPOSED to exhibit hyperluminal stresses in norm space. If it didn't, it wouldn't be much good as a weapon now would it?