[X] An angular, widened saucer to accommodate a forward-facing shuttlebay or deflector.
Issue is Borg can jsut adapt to Phasers and then you're SoL. Phasers alone are not enough.[X] An elongated forward saucer section to maximise the power of a continuous phaser strip.
Judging by the description of how Borg adaptation works, as long as we have a big enough punch the ship could still have some effect against the borg. In otherwords, to be combat effective the ship needs to have strong phasers. If the borg adapt and our phasers aren't big enough, it doesn't matter how maneuverable the ship is: it is going to lose eventually.
Considering how Wolf 359 was basically a scramble of as many available ships as possible, the next time the Borg attack we will not have much warning and will be scrambling again. So, every ship needs to be able to damage the borg because we do not know which ships will be available to combat the borg. Ships with insufficiently strong phasers are just targets to be killed rather than an actual source of defeating the borg.
Therefore, maximise the power of the continuous phaser strip is best. And is, indeed, necessary as we do not know how strong the phasers need to be to do damage to an adapted borg.
I am unsure of the firepower of a fighter, but judging from DS9 and STO, fighters individually are not as strong as a phaser strip. If so, they are not optimal as a borg defender. In fact, they just might be useless against an adapted borg cube. If you are looking at fighters as torpedo launchers- they are not as effective as torpedo tube as the tube has more ammo. Better to stay away from a dedicated fighter for this ship.