Not the main indicators to measuring the project, but you can use telegram to find out how active they are and how to know the responses from other community.
The first thing that bitcoin needs to improve is the one thing that has been dragging bitcoin down for a long time now and that is the transaction scalability issue. Also the recent rally brought up another issue which is the transaction fees issue during high transaction periods. Bitcoin needs to improve on these things asap.
I always think that the tools are correct. Bitcoin is just a tool for us to use. It determines the nature of the user, not Bitcoin itself. This is why I support Bitcoin. It is used and tested on the blockchain.
Yes,there are a lot of hackers but for as long as we remain our private key private we can make sure that its secure so we need to be careful also in clicking unknown link because ot might also the reason for you to be hack.