What is the best SMG in Warzone 2?
This is a difficult question, but I'll do my best to give you the insights and best loadouts. In my opinion, the close-range meta is very open right now, and depending on your playstyle, the answer will not be the same.
What is the best aggressive SMG in Warzone 2?
For season 1, the best SMG in Warzone is, without a doubt, the Fennec 45. The main strength of this weapon is also what could be the only downside: the fire rate. Experienced players will manage to control the recoil due to the fire rate, but casual players might prefer one of the two other options below.
What are the best versatile & reliable SMGs in Warzone 2
I agree that the Fennec is not for everyone. If you are looking for a reliable SMG that you can use in most situations and will never let you down, you are probably looking for the Vaznev-9k or the Lachmann Sub.