That sounds good if it was a single player game but since it is not, a charge up one shot should down and does down a full health FT member.
Plus if you charge and fire it again at a downed FT member it does kill them
Everyone has to remember, this is a game. Not the movie. If people get one shot (and died) that would be OP. Also, if you want to point out, Blain got shot by the Plasma Caster once and didn’t die from the first hit.

