Well, as i'm not actually playing this round (who works four jobs?!
), i would imagine that there would be more people trying to take advantage of second class targeting; ie, sending Syren? to take the hits rather than the pod class Destroyers (or cruisers) or whatever.
Whilst i'm not overly convinced that sending a ship's T1 in place of its T2 (which fires at reduced firepower) is especially brilliant generally, i'm sure that there are plenty of instances where it could be made beneficial to the attacker with some planning. Plus, those Syren (or whatever) can now also shoot at two defending classes themselves...