Considering the amount of people that didn't realize you can just look up someone's entire deck and play history with the username during that 2 minute period, it might be better that it is essentially gone haha.
I still get lazy and don't always check, but it sure gives an advantage to know which legendaries they own etc... When you need that info. I remember feeling like I was a noob when I moved to PC after a whole month of playing on mobile when I realized it was so easy to see everything about someone on PC