Here is a Blackhawk brisket cooked on my Keg which is basically an insulated UDS. Nice smoke ring. Doesn't look like it was cooked in an electric cooker to me.
So, it's possible to get a good smoke ring with the BH recipe. This is my latest BH brisket cooked on my Jambo. Nice smoke ring all around.
This is the first chunk of beef I cooked on my UDS. It had a very wide smoke ring.
I think you should look elsewhere for the problem. But, I know that if anyone can fix the problem you experienced this time, you are the man for that job.
So, fix it already!