Thanks for the replies
With them, and as I though more about it I’m starting to change my mind
I know one should never use real world physics in sci fi but … I started looking at it like it being kin to trying to launch a paper air plane or a toy remote plane out of a car window. sure it will fly just fine in the car (in the warp bubble) but once it goes out of the window (leaves the bubble) bad things happens.
Then I remembered reading a safety brief in the Air Force. a pilot flying at or just above a missile’s max safe launch speed. It launched. wobbled) for a little bit (as it and the AC were traveling at the save speed, but then as the rocket sped up it took off more stably and flew safely. Of course it was YEARS ago when I read the brief so I may be glossing over some stuff.
With that , and in light that you all pointed out there are instances in even TOS of shuttles having warp, then I can see that it is possible to launch at warp.
However, I’d say with safety etc it is best to be in impulse speed (require no roll unless there are other things in play), then there is safe warp speed for the launch ( ??? warp 2, 4 ??? say at least a step down from normal warp travel speed) which requires a simple roll with a difficulty of 1, and then anything above that safe warp launch speed the difficulty goes up significantly as the speed increases.