I fully expect that Disneyland will include pyro on ALL nights that they would normally present a fireworks show. Basically that is Friday, Saturday, Sunday, and Holidays year-round, plus nightly in March and April for about 5-6 weeks, then nightly from Memorial Day to Labor Day.
I expect the Halloween fireworks show will be offered in September and October and the Holiday show will return in November and December. The park has a permit to offer fireworks on roughly 250 nights a year. I doubt they will put such a valuable permit in jeopardy.
The scaled back show is more about offering something on nights when there normally would be NO offering.