Well, as I see it, witht he day one DDE unlocks they've put themselves between a rock and a hard place. If it would have required to be veteran level in the assault class for the Mkb and AVT, the DDE buyers who complained about the weapons not being available on launch would propably explode because of rage. Also, they wouldn't have gotten it any sooner than non DDE buyers then.
But with the DDE players being able to take those weapons now, it obviously lead to a whole bunch of other problems.
Having said that, I haven't noticed that much difference to before, honestly. I still play almost exclusively rifle, I still regularly appear at the top of the scoreboard, and I for one have only be killed four times by a Mkb since the patch that unlocked it, and scored three CQC victories against Mkb users with my MN91/30... Also, after everyone had tried out the Mkb and the AVT, I've seen the number of people using them decrease, as the other weapons are more useful on certain maps in certain siuations.