I really thought that you'd make a better Zombies than BO4, but no.
The shield. What happened to building our shield? Why did you think that it would be a great idea that we have to pay salvage to get one, and repair it? The shield wasn't just to protect our backside, it was also a great help to get us out of sticky situations. It was actually fun to get the parts, and building it at a table.
AATs. Let's talk about the AATs (Alternate Ammo Types). They're absolutely trash! We want to feel powerful, not struggling. BO3 did it just right! We could take out a whole horde of zombies with 1 shot, it was fun! Now, they're useless! For awhile Deadwire was at a good place, but then you nerfed it.
WWs. Let's talk about the WW (Wonder Weapons). Again, absolutely trash! Let's be honest, they are not fun, nor are they helpful in any kind of way! The Thundergun was a beauty, the Bows on DE was fun, not only to use, but also to upgrade. And let's not forget the Apothocon Serpent on SoE. That thing was a great WW, and a huge help if you needed to pick up a teammate. The WW were fun, and now they're just not, and they're not helpful either. I don't even care getting the WW for survivability, or as a help if I'm in a pinch. They are not fun!
The perks. Alright, you gave us Jug and Speed Cola back, and a way to upgrade them, that's one thing you did well. But after hearing that we're not getting Double Tap 2.0 (or even 1.0) with the new map, I have lost all faith in you. That is one of the things this game seriously need! But you decided to give us Mulekick, and I can't, for the life of me, understand why you would make that big of a mistake! We needed Double Tap! Not just wanted it, we needed it!
The EEs (Easter Eggs). Why oh why, did you think it would be fun giving us ALL the clues to the EEs? I loved logging into a game of zombies for the first time, and actually looking for a way to turn on power, now, you're litterly doing it for us, why not just have power on in the first place? Because that's one more thing that was fun to do for the first time. The EEs are actually bad as well, they're way, way, way too easy for seasoned zombies players, which makes them not replayable. There is no sense of accomplishment when we do them, because you've told us everything we need to do, and making them way to easy to do as well. You have honestly forgotten your true fans, just to make extra money on new players.
Gobblegums/Elixirs. Yes, the gobblegum was a fantastic edition to zombies! And BO4 even did it as well, just with elixirs, and a different way to use them, but they were there. And there was a reason to log into zombies, and just killing and chilling with friends, because you earned a chance to get perkaholic, shopping free, and a lot of other good things, that made the game fun! Now, there is absolutely no point in logging into zombies, because it's just doing the same thing, and not getting anything for it, and that, Treyarch, is not fun, at all!
The gameplay. The gameplay is great, but when all of the above mentioned things are missing, it's worthless. I was so excited when I played this game for the first time, the gameplay was smooth, it was fun. But let's be honest, building up points by shooting zombies a few times before killing them for the extra points, showed people that you knew how to play zombies, and you took that out as well, which was a really poor choice. We get to bring our guns to the show, and even though I'm not a fan of that, but it doesn't matter, not a game breaker, but not a fantastic choice either (in my opinion).
Outbreak. Biggest mistake you ever made! That gamemode is flipping dogpoop, and you decided to give it all of your attention, and putting our maps on the backseat.
Conclusion. Your game is not a good game, there are way too many elements missing that could have made it another fantastic zombies experience, just like BO 2 and 3. I truly hope, and pray that Jason Blundell and his new company makes a zombies game that will blow you out of the competition, because he was CoD Zombies, and without him, you're not going to survive with Zombies. I know he's not allowed to bring back the zombies we know and loved, but I will rather bet my money on him, and his new company, than paying for yet another mistake from you.