they are charging very fast
they can cloak
the funny gammon bombs
they die pretty hard in yellow cover (in late game there is plenty yellow cover all around cause of mortar hits on the ground)
so yeah, vet 3 commandos are so funny.
They are expensive, doctrinal dedicated anti infantry. It's okay they deal a lot of damage in cqc. And their veterancy is really mediocre.
Light gammon bombs are another issue.