I've been with my 6 Plus for a couple of weeks now. I just went to the Apple Store today to play a bit with the 6 and I'm strongly considering downsizing. I can't use the 6 one-handed either and it's not really pocketable in my jeans (shallow pockets) but at least I'm not in constant danger of dropping it like the 6 Plus.
It's fine that Apple released a 5.5" 6 Plus as long as they still give us smaller choices like the 4.7" 6.
Options are good. I'm not having any trouble with my 6+ and I like the bigness of it. But quite honestly, if 6 was the only option I would have been perfectly happy with that too. I just like iPhones lol.