Maintaining an all working games list is impossible. You should try each game every MAME release as there are a truckload of non listed regressions. As example, I'm testing my list on 0.259: "area51" has serious performance issues on my i5 4460 (around 70%), "area51t" works like a charm. "botss" is listed as working but it throws an error when you start the game and the system resets every single time. "botss11" clone seems to work. MAME team does not check every game as 30 days schedule is just too crazy to properly test everything. Moreover if you use non official MAME (es RA MAME core, no nag, arcade64, etc) some games that works on the official version might not works.
"pongf" seems to have been removed, as far as I remember it was listed as a parent on 0.207
You seems to be very good with databases, why don't you add tags not used by HS but usable in AS3 skin (story, score, number of players, etc)