This policy is looking more and more like a big ol' money grab to me.
Unless something changes, January is the end of signature and character dining for my family and that's a shame... Dining is a big part of our Disney vacation experience and when you take that away other destinations start looking better and better. But no meal is worth having to keep an eye on my CC for fraudulent charges or paying $50+ for nothing if one of my kids happens to get sick on our trip.
I agree! As an AP holder, I go to WDW 4-5 times a year and since I don't care for most CS, I do most TS (including a Signature restaurant most nights). I'm taking my GS down there in Feb and will be doing alot of character meals (like 1-2 a day). Thankfully I made those ADRs just prior to the policy change. Feb will be the end of signature and character dining for me too. For my May trip I purposely made ADRs for restaurants that did not require the cc guarantee. Since I have the TiW card I also made a point of making ADRs at places like Bistro de Paris and the Swan/Dolphin restaurants. Once I get down there I'll try for walkups at my favorite Signatures and then cancel my other ADR if I get in.
Things happen, I dont mind a cutoff time frame, like 15-20 minutes, but FIVE minutes is ridiculous.
I find that hard to believe though. Having multiple trips under our belt as well, we have encountered the planes, trains and automobiles craziness that is WDW transportation. We have missed many a rope drop through no fault of our own. We are not usually late for ADRs either as I usually make them for the park we are going to be in for lunch or dinner. But like I said we were stuck on a monorail and they would not let us off, it wasnt safe. We have been stuck in rides that broke down that was a 5 minute walk to the restaurant.
, or that sickness and other issues do come up while on a trip and one should be able to cancel and not have to bring a sick family member to a meal or have a fee charged to you.
, hope it all works out

We also wondered if it had something to do with Geena Davis and her family dining there. She had done the CP the day before and was touring the parks with her family. They were finishing up when we finally got seated an hour later. Also MM would not check us in...they refused, they actually encouraged us to shop or go see the Osbourne Lights and come back in a hour from your original ADR time, there were many ticked off people outside MM that evening. For some people the difference for eating at 6 or 7 can be huge. We went and saw the lights and came back so we were ok.