In STO, every single playable ship is capable of attaining quantum slipstream velocities, for game-mechanical reasons. That includes the NX-class light cruiser and Type 8 shuttle craft. :-)
But then STO is 20+ years away from the current time period in the novels (not to mention being a parallel reality too!), so you could posit that by the 2400's, QS tech has evolved to the point where hull streamlining isn't needed anymore. Maybe it gets out-engineered, like the Intrepid
-class's variable-geometry warp nacelles...