I agree with Mongoose; support ships for bombers are wayyy too small to carry 15+ helios for each Ursa.
Space Superiority Fighter... good at all things... like the F-16 MRF. Multi Role Figher (AKA Air Superiority Figher anyone?). It carries up to 2000lb JDAM bombs as well as anti-fighter missiles. It can do both... at the same time!
The Myrmidon is similiar; it can carry the ZOMG Helios as well as banks full of Tempests, Hornets, Rockeye, Tornado, Stiletto II, and a heck of
of other stuff! It is the most flexible platform in the game...
A true easter-egg in freespace2 could have been (but isn't) in the first nebula mission, where Kappa wing spots a Volition Bravo and is destroyed or somethng... a bit more interesting, don't ya think? Mounting Helios on Myrmidon is not a easter-egg as it is such a flexible ship.
And who says an Ursa can't be a fighter? I did quite a bit of dogfighting in Slaying Ravana on Insane! The Ursa owned all the shivans! I beat the mission with 92% hull. Anyways... it would be interesting if a Myrmidon MkII or something was made, that features a top-side turret like a bomber has, bigger bays, and stronger shields. It'll be a uber-ship then... but oh well!