Hey, that works!
I did just remember that in the VertexMod scene, I think there's a sample script that can snap the verts of a text mesh itself so specific coordinates, so that would work, too! But yeah, the centre-align doesn't like to work naturally... I really like this fix you did and if it works for you use it for sure! (That's why i ship STM with source code exposed, after all) but yeah, I'm not sure about including it for everyone... it's been a while since I've modified the pixel snapping code, so I could be forgetting about some edge case I need to watch out for.