I see your point, and im open to making changes in the bio....ill just make a final point.
This is assuming that torpedos travel at close to the speed of light.
Here is a quote from EAS (A site I like to use often)...
As it looks on screen, most notably in "Star Trek: The Final Frontier", the photon torpedoes always need several seconds from the launch to the impact. If the target is several kilometers away, their speed would be only a few thousand kilometers per hour, not faster than a present-day missile. Well, we have to take into account the "dramaturgic" close distance of the fighting ships too (see further below). Still, the time of several seconds to the impact remains, enough in my opinion to target the approaching torpedo with the phasers and destroy it. It seems we have to accept both the facts that the target is usually shown closer than it actually is and, in addition, photon torpedoes are slower than they should be.
There are no canon facts established for the speed of photon torpedoes, except for the bits of technononsense crammed into tech manuals. The formulas do not work, and that is actually intentional, since they are just there for show. Instead, we have screen evidence....though simplified, this is how it goes....
Torpedos can miss, ships can move out of the way from the line of the torpedo and avoid impact. Even if the speed was only half of the speed of light, this would make a torp, on average, about twice the normal impulse speed (impulse speed is usually one quarter of the speed of light, and this has been established). An argument against high speed.
Torpedos can sustain warp travel when LAUNCHED at warp....and this has been established to explain whey they were used at warp in the show. So this means, if you conjecture, that a torpedo can at least sustain the speed of the launching ship. Conjecture supported by evidence.
Dramatically speaking, torpedos seem to travel only slightly faster than the ships they are attacking, otherwise we would never even see them on screen. Case in point, however, torps have been shown to travel both slow (Wrath of Khan) and fast (First Contact).
So here was my conjecture....A ship can avoid impact in three ways.......
1) At warp, increase to a warp factor beyond the speed multiple capability of the torp. This ship cannot do that, since its max warp is limited. A weakness.
2) Increase impulse speed to a factor above the speed multiple capability of the torp, depending on the speed of the launching ship. In general, any ship has the capability of outrunning a torpedo, but at max impulse for most ships (.25 SoL) torpedos can increase to, say .35. This ship can increase, temporarilly to .351, say in a straight line away from the torpedo. You could say the Defiant could do the same, perhaps. This would be only sustainable for a short period....one could say that the warp bubble sheilds the crew from the time parallax, since that has never been specifically stated on screen. Only in modern science.
3) Have a RCS system capable of instant menuvers, coupled with a burst strength for the IDF usually only reserved for Warp initiation. Gel packs could perhaps help with this, but does not explain why other lesser ships in the shows could menuver out of the way of torps.......one could argue that the lock was not conclusive, but we see ships move out of the way quite a few times.
I am contending that this ship has both 2 and 3...but if you disable the impulse drive, you remove its primary strength....menuverability.