Definite no. The Mortars were created to be capship torps. You want a torp on it, buy a mortar. What is it with people thinking they should get torps for capships? They are on fighters for a reason, and there is a reason mortar was made.
Ahhh, this makes me think of ye olde Starlancer... where capships had whole broadsides of torps and we had to chase 'em down like right panicking fools...
Now, perhaps this franticness could be implemented on the really big capships had LOADS of torps, but the torps travelled even slower, at a ridiculously slow pace; and the hardpoints were very widely spaced, so that point blank attacks wouldn't have as much effect on smaller caps.