I don't understend why isn't he banned yet? Almost five hours have passed, the post has more than 40 views and he is still playing deadlock on the same account with cheats.
Don't let this ruin your day. It sucks and I've know how it feels. Report the cheaters and if you need to, call them out with proof and enjoy the matches that have no cheaters/smurfs.
Because...
It's still in alpha.
This is the forum section for community clips, which is now also used for calling out cheaters (as there doesn't seem to be another way to do so apart from the report button).
Five hours is nothing. By the time one of the developers sees this and actually responds to it or forwards it, some time has past. By the time the other developer picked up on the message, some time has passed. He/she has likely more tasks to follow up on and might have other priorities.
All we can do for now, in my opinion, is call them out here and make it as easy as possible. Present the proof and remove the doubt.
I also think a simple ban is only a temporary fix unless it's a ban based on hardware or something. You have to either be able to detect them automatically (e.g. using cheater info like this to train a system to detect these) or ban their account, their alt/main accounts, their hardware, ...
I honestly believe there are a lot of cheater reports. Not all are legit, so it's important to present the proof as simple as possible.
But yeah... dearest Valve developer that reads this... a ban would be suitable imo.
edit:
Also, valve HQ is based in washington state if i'm not mistaken, which is GMT-8. So There might also be some developers that require sleep/rest at times at the time of your post.