From what I've read and heard (I'm not a medical person) it is a very good move. At Mayo I was told that Relugolix was proving more effective other antiandrogens. There may be other reasons why you were started on (bicalutamide) Casodex, but I'm given to understand that it is the least effective of the antiandrogens and is seldom prescribed alone. The side effects are presented as being less severe with Relugolix (Orgovyx).
If you are not on a bisphosphonate, you might ask about Zometa (zoledronate).
wishing you the best luck