Ive been playing around with this, looking at all the blocks and I really like it c:
The one thing I just don't like too much is the ice block, for some reason, to me at least, it just doesn't mix well with the ground around it.
I personally don't like the cursor (I don't like too many :P) I know its the logo of the pack itself but yeah. I'm thinking it would look nice just as the middle square, but just my dislike of cursors speaking haha.
The glass block is a little hard to see in the inventory screen, not sure if you could fix that.
I love the ender chest's design, but i don't really like the green ender pearl like design on it, I'm thinking just putting a little lock like the normal chest on it.
I think the jack o lantern could have a little more light coming through the pumpkins face, the color that's coming through the face doesn't really seem like its lit.

The end portal block is really awesome just wanted to note that ^~^
I was looking at 128x version of the pack just a by the way.

Cant wait till its totally finished c:

This is valuable feedback. Thanks.

There are two tessellations for blocks; a rounded one, evident in cobblestone, water (when visible), nether portal and lava, while a sharper one is present in obsidian, ice, netherrack and ore blocks. I am not quite sure how I could re-adjust Ice although I am considering either softening the edges all around or changing the tessellation to match cobblestone. Perhaps I will generate some screen shots to show you what I mean when I'm done with the 32x conversion.

Glass is a dicey issue, since it's appearance in your inventory is a scaled down version of it in the game. I design my glass to be seen through, since I only use it for windows... One idea that occurs to me is to look up how the Connected Texture mod is working these days, and come out with an all new glass that makes use of Harmony's "symbol", but then expands it away from the center as you connect more glass. That will not happen before official release, but I think it will be done down the line.

Enderchest will be left as is, (as will the cursor if no one else complains) but I can send you a separate, smaller "fix" that you can put above Harmony on your resource pack que. Consider it a Thank you for the input :D

Last, the Jack-o-lantern... I'll see if I can make it look more bright inside. No garentees there since it's more a matter of my ability rather than decision :D

Could you really do that? That would be awesome!~ c: