It is obvious that Bitcoin Core is not achieving its objectives in forwarding technology, and therefore it is obsolete and should be superceded by a newer system that can promote more rapid innovations and changes.
It seems to me that Bitcoin Core has become stale and stagnant, and resistant to change. It is crucial that for an emergent technology to grow, the community needs to foster ways to provide some space for new ideas to take shape and grow. I dont see why the Bitcoin developer group is having such a hard time in achieving this.
The real change in BitcoinXT is not the technology, but the opportunity to break the stalemate from making changes to the technology. In a sense, this is more about creating a more open system for adopting changes.