Most of them are actually similar when we look at what goals they are trying to achieve - to be the platform an open blockchain platform for smartcontracts and dApps that is decentralized. Although DPOS is not the best for decentralization as here guys who entered early and grabbed the votes mainly control the network and if you are to run your node you can't profit but people who entered early get profit out of it. DPOS are EOS and LISK and you should have something about this in your head this information. Other than that Lisk market itself as eay to write code in since it uses javascript which many devs know already.
You can't tell people to stop to make new things and new ideas. Ethereum and Neo are not perfect like many of cryptocurrencies out there because there always has to be some trade-offs in technology. Hopefully we will see more advanced platform in the future.