Both pets are problematic, though the siphon drones are worse by no small margin.
That being said, I can't respect anyone who says something like "Don't nerf my broken cheese unless their broken cheese is also nerfed!" These kinds of players obviously care nothing about balance, and only serve their own self-centered agenda. Broken and grossly overpowered elements needs to be fixed, no matter what faction or play-style it belongs to. Grow up.