Neglected? It takes a special amount of skill and a lot of work to screw it up so badly in the first place. The Web is designed to display text by default, and Blogger fails at that.
Yes, neglected. They put resources for the js revamp. It was cute at the time, not anymore, Google surely knows it but doesn't want to invest anything here (for now). They just pushed a huge redesign of G+, supposed to be their flagship, vastly simpler and faster (to the point of making it even less relevant). Blogger gets the remains if anything ever drops.