Our household had the same opinion, the hockey newbies were saying they could follow the puck, especially when it was wrapping around the glass with the tail enabled.
I wasn't so thrilled with the length of the trails, but the subdued grey wasn't so distracting. Maybe if they could make it come on when its a puck in a high rate of motion instead of always being there.
I do like the player tags and the tracking shift times and stuff so far though.