Hi amr, thank you very much for your input, having a single UC for the models, as you suggested, with appropriate tags and alias seems to be something that I could try. I posted the same question on reddit and they shared the same concensus re: having a dedicated UC for the models.

https://www.reddit.com/r/databricks/comments/1dtur0z/ml_model_promotion_from_databricks_dev_workspac...