Originally Posted by
Dean V
How is what you are proposing to do an "upgrade".
Looks more like spending a reasonable amount of money and time to save a minimal amount of weight and get less gears.
The adoption of a double crankset is mostly for compatibility reasons/future upgrades, as most of Shimano's high end components no longer support triple cranksets (at least officially). So unless they come up with a new high end road groupset supporting triple cranksets in the future, there will be less options available to refresh a worn out transmission while maintaining the overall quality of the groupset (unless you mix components from different years). I'm most concerned about brifters: as far as I know there won't be any more 11x3 road groupsets for example.