Bullethead: We lost more than just
Kimmet. Nurse Britt is likely gone forever and ever. May she rest in (irradiated) peace.
I don't know that the Behemoth is easier to take down than before.
Burt had to allow it to get really really REALLY close in order to shoot it's other eye out. Which is another point: Burt's actions wouldn't work against a perfectly normal healthy Behemoth. It would still be able to see out the other eye.
Arrowhead was starting at a disadvantage. He also had to get his arm ripped off to help him bleed out before finally biting it. It still survived a pipe bomb, plus multiple small arms shots among an infection and an arrow in its eye. I'd rather take my chances on other types before a behemoth.