Yes, we LOVE TPV at the CR. That is the best view in all of WDW, IMO. Watching Wishes from your balcony or bed was priceless! Especially with little ones in their p.j.'s!
The TPV at the Poly is different, but also very magical. Yes, it is more distant, but you have a front and centre view across a beautiful lake. There is no parking lot below. Agreed, we hardly even notice the parking lot because we are gazing at the panoramic view of the MK area, but, if you look down, you do see it. So, it's a bit of a trade off. Both views have a lot to recommend them.
The view is very nice on its own, IMO. The fireworks are a fantastic bonus. Unfortunately, I have no idea how to tell what the future fireworks will look like from the POLY. I will say that the past projections on the castle were lost to me from the distance at the poly.