There have been a lot of posts and replies on this scaling issue. For example,
here is a reply. There are a few Bcash shills in the topic too.
What if somebody could solve the concerns of decentralization in a larger block? How valuable this will be?
Solving concerns of decentralization with increased block size are mostly hardware capacity dependent. Hardware capacity vs cost ration is not expected to increase in the same way as the blockchain size with a increased block size.
That is why it is logical to go for scaling through innovations like SegWit and LN. An agreed upon blocksize increase can be done when other implementations have become mature and robust enough.