I have to say I liked the earliest font the most, at least for numbers. Readable at a glance while having a cozy digital feel. The new one looks more like a "default font".
The new font is much less readable (and some numbers are pretty ugly), I was trying to make it look more like the letters in the instructions. I changed it to something that is a mixture of the new one and the old digital one, so hopefully it's better.
It's important that the "next block" element is where it's needed the most, as it's the most useful one during gameplay. If the player can afford to take a look at it just before placing the current block, the bottom is alright, and can be seen nicely from the corner of one's eye.
Good point about it being the most useful. I think the bottom is the best place for it because you are always looking at your blocks which are on the bottom, but putting it at the top might work too because that's where all blocks come from. I'll have to try it out.