Totally agree! No such thing as "too much" when it comes to ones arsenal and lets face it, reloading or recharging takes time. Every second counts, drop the spent blaster with one hand as you pull a fresh one with the other and never miss a beat.
"That which does not kill me...had better run pretty damn fast!"
I'm quite certain there's only going to be one of each, I don't think it would be cost-effective for them to include a whole pile of them with the trailer.
Fansproject's weapons are actually cooler, but that doesn't make me change my mind about BTS' trailer.