I agree, current version is so much more enjoyable than when I first check this game out in Alpha. In 2 days got all the way to day 159, had 2 of every class type (veteran), and had all town upgrades at t4. Very next day, accidentally deleted the file location :(
It's only take me, day 19 that all class in Veterans Including All the Curse Class too.😅
Which not a big deal, that this game are more on IQ & have great success of survival skills.🙄
Which only have to sacrifice few weaker team & know which to upgrade 1st..🤣
Here my current higher DPS as prove in the picture. 
As why, doesn't make sense, the next day deleted the files?📂 (Mean that you, just saying that you didn't get all the class or something.. Which no one, got that dumb to delete if that doesn't happen, if that just a lie 🤥)
It was entirely my fault, I for some reason had multiple copies of the game downloaded in my files. Thought I only needed to keep the updated version, but turned out the newer version was pulling my save instead from the older version (which I deleted to make additional storage space). Sucks for me, but it was totally my own fault.