When they first started, the curry puffs were really good and like you said, you had half an egg. Gradually, as time goes by, they got more and more stingy with the ingredients.
I like the variety they offer in their stands though. Although I find them pretty pricey. Also, I noticed that they don't seem to change their oil frequently enough. If you reuse oil that's heated to high temperatures, and there are sendiments floating inside from previously fried stuff, you're going to have carcinogenic agents floating around.
Sadly, drops in standards happen to a lot of food establishments here. Take Sweet Secrets for instance. When they first opened for business, their fresh fruits cake had this awesome sticks of butter cake and chocolate cake on the sides, stuck together with some kinda strawberry jam. Then, they got lazy / stingy and they put crushed peanuts on the sides of that cake. Now, they don't even bother to dress up the sides of the cake and just wrap a film of plastic round it.

So, my family went from buying that cake once a fortnight to maybe once a month and now, we don't even bother cause we got so fed-up. Last time I bought from there was a few years ago.