We watched Wishes and fireworks from the Rose Garden in January. The view is obviously "off-center" and not as good as the parade viewing area, but it's nice to not be crowded, pushed and "cut in front of" at the last minute. Go for the Parade view if you can get a FP+ for it and use the Wishes one if you can't.
If you do go to the Rose Garden area for the fireworks you almost have to think of it as watching the fireworks as a stand-alone event without the castle as a part of it for framing. The Wishes view is "OK" but almost comes down to where in the Rose Gaden you stand- some trees can block part of the view. Still, an improvement over the more crowded areas and hassle-free. Definitely going to try for MSEP next time we go. By the way, a nice place to watch MSEP is from the railroad boarding area if you can get a front row seat. Cool angle from above around the square.