1. What led to the development of Decred?
Here are a series of blog posts that discuss the motivation for Decred:
2. How do you pronounce Decred?
The correct pronunciation is in the opening line of the Decred Constitution.
Decred (/ˈdi:ˈkred/, /dɪˈkred/, dee-cred)
In other words, it is a long e as in the word decentralized.