You know i posted a few weeks & months back about things like having only 1GB of ram on both the 6 & 6 Plus and how the apps won't be optimized for the larger screen for a while and a few slated me for this, turns out i was right all along.
Being an early adopter can lead to frustration waiting for things to catch up in this case apps being optimized for the larger screen.
As I've said before waiting abit always pays rather than rushing out buying something just for the sake of being one of the first.