There are a ton of EA games that are in that state for 5 years, and when they do hit 1.0, they keep releasing new content like it never left EA
Most games EA or not take many years to develop.
Yeah it sucks they took longer than they initially said but when i saw they had all that planned to be completed within a year i had a lot of doubts it would happen

Millions of dollars in sales will not account for years of experience (which the devs do not have) also you cant just hire new people and expect it to just speed up. It takes time. A small group like this was not prepared for the unflux of problems that come with managing a game with millions of buyers (all on different hardware) so that took a lot of time too
Honestly they need to update a lot of existing content before i would even consider 1.0 (something they wont do) a lot of these mechanics feel slapped in there, and not really designed around the overall game