@BigSnicks My personal opinion on the drill is that its sitting at a good balance.
It forces players to move from behind cover, it deals a lot of damage to those who don't move, it counters the right kind of legend abilities, (such as Gibraltar's shield dome and Rampart's walls), although it can go through knockdown shields, (and if I am remembering correctly, it does stick to the knockdown shield). I think it also sticks to players for a moment or two, before falling off.
I also don't think the drill should get two charges, unless it does less damage and doesn't last as long.