The 60th anniversary is drawing in lots of park guests this year too, but that hasn't even been going on for a full month yet, so it will be interesting to see how the crowds progress for the rest of the year in light of the new nighttime shows.. 
My favorite time of year at DLR is HalloweenTime, but the Holidays are a lot of fun as well. I've gone during the full week before Thanksgiving and it's a good time to go. The crowds were okay last year (weekdays at least), with a noticeable uptick in crowds on the weekends (Fri afternoon through Sunday). Much of the Holiday decor and activities are underway, but a few things didn't get started until later into the season (e.g., the Gingerbread house in GCH). Fireworks should be nightly (as is WoC) once the Holiday season official starts. F! will be running on the weekend only schedule until later into December (and during Thanksgiving week). It's worth noting that November 12-15 is the Avengers Half Marathon, so the parks and resort will be busy that weekend.
When you say the first week in December, do you mean the first full week in December or the week that ends with the starting of December? I ask because the first weekend in December has lately been when they've had the Candelight Processional event in DL. While it doesn't pull in the crowds that the marathon weekends do, it does tend to mean that DL is impacted (larger crowds, especially on Main Street) that it would be without CP.
Like all things with Disneyland, it's hard to know for sure what will be happening from year-to-year. It's possible that things will be very different in 2016 than they have been in previous years, but assuming that 2016 is similar to previous years, fireworks should be presented nightly once the holiday season starts in mid-November. We don't know yet how things will go with the PtN, but I would guess it will also be presented nightly during the holiday season (although we don't have a "history" for that parade yet to base any decisions). WoC is also likely to be nightly. F! will probably only be presented on weekends during the periods you're considering, but it's worth noting that the DLR and WDW versions are different. While they do have some elements that are similar, they also have some very substantial differences. I like the seating arrangement at DHS a lot more, but the show at DL is better. In other words, I wouldn't rule out DL's version of F! just because you can see or have seen DHS' version.
It depends on what you mean by crazy busy and at what point something is crazy busy to you. I do think early December weekdays are busier than mid-November weekdays, but they aren't yet approaching the really busy level that you see in mid-to-late December. Rides won't be walk-on, but the lines won't be hours long either (in most cases - RSR always seems to have hour+ lines). The only thing that was really busy in both mid-November and early-December was the parade route (we do not know if the Christmas Parade will be returning in 2016 or not). I do like the logic that going in mid-November means you'll have to wait a few weeks less for your trip!Mid nov is ideal to me since Dec just gets crazy busy and heck its a few weeks sooner so less waiting to do
Like all things with Disneyland, it's hard to know for sure what will be happening from year-to-year. It's possible that things will be very different in 2016 than they have been in previous years, but assuming that 2016 is similar to previous years, fireworks should be presented nightly once the holiday season starts in mid-November. We don't know yet how things will go with the PtN, but I would guess it will also be presented nightly during the holiday season (although we don't have a "history" for that parade yet to base any decisions). WoC is also likely to be nightly. F! will probably only be presented on weekends during the periods you're considering, but it's worth noting that the DLR and WDW versions are different. While they do have some elements that are similar, they also have some very substantial differences. I like the seating arrangement at DHS a lot more, but the show at DL is better. In other words, I wouldn't rule out DL's version of F! just because you can see or have seen DHS' version.
It depends on what you mean by crazy busy and at what point something is crazy busy to you. I do think early December weekdays are busier than mid-November weekdays, but they aren't yet approaching the really busy level that you see in mid-to-late December. Rides won't be walk-on, but the lines won't be hours long either (in most cases - RSR always seems to have hour+ lines). The only thing that was really busy in both mid-November and early-December was the parade route (we do not know if the Christmas Parade will be returning in 2016 or not). I do like the logic that going in mid-November means you'll have to wait a few weeks less for your trip!
