Mine wasn’t eligible, but I’m still covered under AppleCare+ until July 22 this year! Good thing because it’s starting to bulge. I keep mine in a 12South stand hooked up to an OWC dock with a keyboard, Magic Trackpad, and monitor. I take it away from the house maybe once a month to record music, and last time about 3 weeks ago, I noticed the deep press on the trackpad wasn’t working. Even a normal click seemed broken but still working? No battery bulge yet.. didn’t notice any of this about 2 months ago at our last recording session. I didn’t even think to check for a battery bulge until reading about all of this..
So, long story short, I was told that the effected laptops’ time frame might be expanded to include others of the same model (mid 2015 rMBP 15in).