I loved the character of Lockdown;
- His transformation, I don't know if anyone noticed how his front window shifted together but it looke very nice.
- His primairy weapon; little bit too big for his overal size, but very original.
- His voice; Though I noticed very early it had to be the same actor as Jetfire from TF2, it was very suitable.
- His face; Though looking far more human than any other Transformer, I thought it very suitable as a face he could use to communicate with humans.
As for his head, it remained me a little bit of Robocop. Not saying that his face looks like all the actors that played Robocop, but the fact that a human is surrounded by metal / machinery. As for his face it's looks much more like a black person's face.
Loved the hook too, reminds of those hidden G1 hand-attributes.