This just my own wild speculation without any basis or facts of support. Please don't quote me!

I am speculating that the roll-out of new F and C seats has been slowed down to see what comes out of the potential merger transaction. My point is why investing all the time and money (millions of $$$) if the combined airline decides to rollout unified F/C/Y products and offerings in a shorter time frame after the merger. The last time UA revamped its F and C was in the late 90s. It has taken UA over ten years to rollout the new F/C replacement. If UA combines with another airlines later this year, the combined airlines will be operating two very different cabins for the next ten years. Either CO or US offers F international cabin.:-: