GGG says

0.1: "The reason we only have 3 acts is because we really wanted to focus on making the endgame the best thing ever. We also have amazing unique items."
0.2: "Please understand our vision. Here are some mystery boxes for you. Unique items were trash so we buffed them. Lightning spear pew pew."
0.3: "No druid yet - complicated to develop. Here's a league mechanic for you though. Don't forget about our amazing mtx. Unique items were trash so we buffed them."
0.4: "Yeah endgame is very bad and was never good - will take time to fix. Here's druid and a the first true league mechanic. Oh and some mystery boxes for you. Also unique items were trash so we buffed them."

0.4 Also we noticed you were having a fun time crafting with the homog, so we removed it for you <3