I've been meaning to update it, I just decided to wait for a couple more TPB's and graphic novels to be published first. And would gladly update it within the coming week or two!
But that is exactly why
1. there isn't much Post-Flashpoint work on there.
2. I only included out of continuity tales that were close enough to seem like it was in continuity minus a detail or two. However with convergence (which I have yet to read, and let me know if I am wrong). I might have a spot in the timeline to include all elseworlds tales. It's the same reason why I don't have any tie in comics to games or shows (unless it could fit in somewhere in the current timeline)
4. I didn't include any pre-crisis collections for many reasons. First, I haven't read most of it so I wouldn't know how to accurately place it in the continuity. Second, Crisis was such a defining moment in comic book history & the DC Universe that to me, it was ok to start around that time. Third, Batman as a character really blossomed as a character (for me) when first written by Neil Gaiman and Dennis O'Neil. And last but not least (and I doubt anyone has noticed), I tried not include any comic that has Batman using a gun as if its totally normal, which some of the very first Batman comics had before DC even knew what they wanted to make of Batman.
But otherwise, I love the feedback and glad you liked this list :)