I think it's a horrible horrible weapon. It's perks are damage and area of effect, which don't seem to help much. I mean damage is great... but after a certain point its overkill. The area of effect looks worthless unless their team is idiots and clustering up. Both don't seem worth it over superior range and fire rate which seem to matter much more in this game.
If it shot a tiny bit farther, or a bit faster I'd be down.
You might be using the rapid blaster which is totally not the same as the normal blaster. Blaster OHKOs, rapid blaster doesn't. OHKO is really damn incredible.