I was at an event last night by the parks, and we were watching the last bits of the fireworks. I noticed that the finale for "Believe...in Holiday Magic" was different then usual. It's not that it was horrible or anything, if anything the finale we saw last night had louder fireworks and shells that sparkled (rather then burst into a million sparks as it normally does).
If you wanna see, I did catch it on my phone (though poorly) here: Instagram
This is more of a geeky, and odd question but, does Disneyland normally change their selections of fireworks or their sequences mid-season?