PE is still being worked on, yes. It's had some bumpy roads along the way, and ultimately the dev team did their best towards an ambition project that required more experience than the team was capable of taking on.
Reports are read and listened to, and bugs are worked on. It is still rough around the edges, but the developers do indeed care about the players along with the game, and making their best efforts towards making PE a more playable game. It is just very difficult when a vast number of those reviews are disgruntled people who rather than explaining what the issues are, they would prefer to just simply state it's an awful game, without giving any insight as to why, and what they'd like to see different.
Based on the reviews, ofcourse, mileage my vary whether or not it is worth the buy. Some people love it, while some people don't. I am assuming you are talking about steam, based on reviews, so if that's the case, there is a demo on the storepage you can try to see if the gameplay is something you might be interested in.