Well they sure diluted the loot. A buddy of mine and I saved all our keys and free crates for a few months and used them all super bowl Sunday. In total, we spent just under 3000 keys on rare crates and redeemed another 35 free common drops.
Between the two of us, we got 1 epic weapon. We received 8 legendary variants, all duplicates. All of the remaining epic and rare items were camos, calling cards, emblems and outfits. We received 11 epics of these.
All we want are the guns. Just like with blops3... At least you can craft most of these, but only a few epics unless you plan on spending 1000+ hours getting salvage.
Same bullshit as blops3 in my book. Polishing a piece of shit mechanic still leaves a piece of shit.
EDIT. It's worth noting that I rolled 3 epics weapons before this when the loot pool was smaller, using less total rolls by a long shot.