I totally disagree. Lorca's first course of action was to return to Starbase via standard Warp Drive.
The first thing he tells Stamets is that Klingons are on their way hell bent on revenge, it's only after Stamets mentions making the jump to protect the crew that he says he "would never ask that" and gives a most unconvincing "we''ll be fine just warping there." That whole exchange seemed totally fishing for a jump to me.