I don't understand enough about the technology to know what specifically needs to be done to Bitcoin to keep it going, but it for sure needs to change. The guy in the article was saying that the Bitcoin developers need to try harder and that those who want to change it lack vision. However, he doesn't offer a solution. Sometimes things need to change when you can't accomplish your goals with the own rules you've made. In this case, you have either two options. Lower your goals or change the rules.

Bitcoin transactions are too slow and expensive this definitely needs to change if Bitcoin is to survive.

At this time there aren't very many real-world uses for Bitcoin. It is great for online gambling and certain payment types to multiple people (signature campaigns).