Oh this is lovely. Clean, easy to read and hand stitched :)
Yes please, UC, numbers and some more of the 'basic' punctuation would be good.

May I make some suggestions?
Maybe the "s" would look more 'balanced' with the larger opening on the bottom?
What would be the effect with half bricks used to create the full stop/point (to get a gap between top and bottom edges), or use of the small corners or the 'angled half bricks' to create a diamond shape? Or maybe use the quarter rings to make a circular full stop?
Is there a gap in the top curve of the "e"?

Sorry I can't show what I mean and I'm not sure that my monitor shows things as they are because my computer is not working fast enough and my programs need more power than available ATM :(

The "s" looks good :)
Ah, the "e" looks filled,too :)
Yes xX123, the full stop is more suitable for the airy feel of the font.
My ""but"" is this: the "." and "," look a bit large. I think they need to be seen with UC letters, too, to give a better understanding of scale, maybe dropping the "." and "," one square is all that is needed.

As I can't work out your scale/filters, I'll show you some examples of my experiments with FS (and with an embroidery needle thread and fabric)

Very nice. Just a few small points, I think the verticals of the 'i' and 'j' should come up to the x-height - with the dot above. Also, the right side of 'u' is lower than the left and 'y' looks unfinished.

Overall though, 10/10

Looking much better :)

Why not? :D