[@Sierra] All solid assumptions and conclusions, but we have to play the game that Oz wants us to play: he stated quite clearly that in-system warps and especially in-combat warps are a no-go. Unless Oz feels like making an exception (like he did with my wormhole travel gates, to some degree), then we can only assume that in-system FTL drives and more commonly referred "jump drives" that can allow scenarios like aforementioned "in-combat warps" and "in-system FTL" is a negatory to delve on.

We can naturally take these statements and logically conclude why that would happen, and how it can be mitigated, but that would also mean that we're willingly jumping through loopholes in the original desired scenario (thusly ignoring the specifics of the rules that Oz crafted).

Then naturally, we can also extrapolate from there, that should others acquire the same technology, the rule itself can be easily ignored given enough time development and technological sharing/scavenging and retro-engineering.