If they cut the transaction time from 10 minutes to 5 minutes and kept the blocksize the same for the five minute transaction that would, effectively, double the total throughput.
(facepalm)
i understand the human utility of desire for faster confirms... but
but to do such, has many ramifications and complexity and having to change many things that can affect and risk many things.
EG it messes with the coin creation metric. difficulty rate. and also difficulty retarget time. and many other things.
to implement it is not only far more tweaking bitcoin away from bitcoins main rules that should not be changed. but also to implement and activate
is more of a hard controversial fork that could more easily lead to an intentional split.
Wouldn't it also still be doubling what is added to the blockchain in new blocks, instead of 2mb every 10 min you have 1 mb every 5 min for a total, still, of 2mb every 10 minutes, and still be adding the same, if not more, data transmission between nodes that is the bandwidth concern..