Thought exercise here folks, NOT a suggestion, and NOT a cry for a nerf/buff.
The (alleged) consensus is that Phantoms are almost too good, while Defenders are underwhelming. This seems to have been borne out by the Phantom's ripping up of the meta in Wave 4 and the Defender's er... competitive absence.
And on paper, it's easy to see why one became more popular than the other.
The Defender had a excellent 3-across-the-board stat line and a "neat trick".
The Phantom got the unprecedented 4 attack dice, the ability to boost itself to four defence dice, a super-boost/barrel roll move, and it's own unique ability-enhancing modifications.
And a crew slot. And the Systems Upgrade slot. And higher PS for the generics.
And it's cheaper, too.
But yes - all else aside - that Systems Upgrade slot. The Phantom gets some use out of it, granted (FCS I'm looking at you, Sensor Jammer too for those people who really have to be evil with Whisper) - but does it really need it?
And would the Defender have benefited from it more?
In my opinion, the generic Defenders would hacve loved the ability to take the Fire Control System, and Enhanced Scopes would have been amazing on the named pilots. I could easily see them getting use out of Sensor Jammer and Advanced Sensors as well (although that might have made them a little too much like an Imperial B-Wing).
Could this simple switch at the time Wave 4 hit have brought balance to the Force?