Good points but im not sure the extra .05 sec ads, smaller mag and the AR's apparent need for a grip is enough of a setback.
I am biased because Vepr is my main smg and i just don't feel that extra .05 secs since the ttk is so good, similar to the Ripper. The mag size is the same as the Vector and K7. The K7 has the third fastest RoF.
I have no idea about damage and drop-off, but we are looking at possibly the most accurate smg and in the top 3 ttk. Its a good smg that perhaps falls a little short on range - but guess what.. its an AR too !! People would be wise to use the grip.
Im not screaming op or really saying its op but the whole hybrid thing has me scratching my chin. For me it fills a huge gap in my smg play. Of course it does !