It is great for storing powerplay weapons on...
And FDev messed up here, and they know it, and if they would do anything to change this, there would be several CMDRs that would be very upset about FDev changed their exclusivity, just as there are CMDRs that would not really care if they changed this.
So OP, care to explain how you would go about to convince everyone that was promised this exclusive access to this ship that they are OK with changing is, as that is at the core of this issue...And even if FDev would launch a Cobra Mk5, for all important aspects are a copy of the Mk4, you would still get CMDRs that complain that they still cannot have a Mk4 despite them having access to Mk5 that is the "same" ship, just a different name...