I have no expertise in the science behind it as some others do, but my totally layman opinion is, no, I would not sweat having just a DIN bar.
I personally don't even begin to consider the stereo recording angle when setting up mics. I run CK63s a lot now that I have them and use a DIY made little mount that is around DIN or DINa.
Also, I know the whole standard configs are obviously common practice, we all use them, they work, its easy, but I'm sure the more technical guys will tell you a fixed pattern is really not at all the way to go.
And even so, the difference between DIN and DINa is so small I highly doubt you'll hear any difference in recording a PA unless you're really concentrating on placement in the room and working with a sophisticated playback system at home.