My suggestion is to enlarge the puck and keep it a constant reddish or blueish color while saving the blue and red "streaks" for instant replays.
Anyway, I haven't watched hockey on TV in ages so maybe it looks better on the high res TVs.
I don’t think they need to enlarge the actual puck. I’m fine watching it on a big screen at home. But agreed that the puck can be hard to see on smaller TVs. They can put the down lines on the football field on the screen; why can’t they illuminate the puck on camera the same way? But it would have to be perfect, otherwise I like it better the way it is. What I miss on tv is the line changing. But it’s ok. Still awesome on tv and I still get emotional!