Ms. Jo,
"It's the only airline that gets me from Frankfurt to Columbus, Ohio in an efficient way."
That's also the reason I use Air Canada most of the time for trips to Europe. They always seem to have the flights and partner connections to get me where I want to go in the most efficient manner, with the least hassles. My first and last stop in Europe is usually Frankfurt.
In light of these changes, I'll have to be more diligent in packing my carry-on items from now on. It will be interesting to see if the rules are equally enforced for both domestic and overseas flights. I'll also be interested to see how many of the other airlines in this part of the world decide to jump on the bandwagon and start collecting those extra fees.
AC has stated that this move is to "speed up" the boarding process, but I suspect it will actually slow down the process, at least initially until passengers get "educated" to the new reality. I'm sure the front-line staff are going to be dealing with a lot of angry customers for the next few months.
Overall, I tend to agree with a crackdown on carry-on sizes, as I've seen passengers trying to fit some gargantuan items into overhead bins, items which are very obviously way over the limit. There seems to be a "sense of entitlement" with some people and they think nothing of using most of a bin exclusively for their items.
The timing of this announcement works well for me, as it will give me some time prior to my next trip to adjust my packing to fit the new guidelines.