With the new block ID's being added in, hopefully now we can get those long awaited block variations that will finally complete those long overdue finishing touches.
Obsidian/Glass/Sandstone Stair Blocks,
New fence variations like a Birch wood fence,
Stained Glass maybe?
The list goes on but these are things I think should be in the game simply for symmetrical/aesthetic purposes.
Also I'm pretty sure there's a Stained Glass mod out there somewhere, but I think we should be given it in Vanilla as the tools are already there: Dyes and Glass put into a Crafting Bench with Glass in the centre square and 8 dyes of the desired colour surrounding it (I know that's pretty obvious, but in case a question arose on how it would be done its answered already).
Jeb, though, either way man the community is happy with these awesome changes. Good job man!