They need to be better to sell. They don't need to be better to be accepted and ideally, they should be somewhat balanced with existing ships and capabilities, otherwise you end up with power creep - then what happens is either the devs make the game easier by adding more powerful ships or they increase the difficulty leaving older ships in the lurch - ships we (in general) spent money on perhaps with paintjobs and ship kits as well as the investment in engineering and outfitting.
I'm quite surprised all the core systems on the PC2 are so capable.
I mean, even if they'd shrunk the PP and PD by one size they could have created a bit of a dilemma for players.
Fit 8A thrusters and you'll have to compromise of the shield and/or weapons.
Fit 8D thrusters and you can have a powerful shield or decent weapons.
Etc.
I guess it's nice that they aren't pre-nerfing the new ships but it does create a situation where older ships (and, by extension, the work dev's put into creating those ships as well as the effort player put into outfitting them) are now redundant, and that's kind of sad.