The node system is already diverse enough that many things can be improvised, but of course it would be nice to have more compact and streamlined tools.
In v0.2.0 I'll be focused on adding some of those crucial nodes that's needed to make very high quality textures like substance's tile generator, blur, slope blur and and hbao nodes.
I've noticed that the "tiling" setting in the preview doesn't affect the height map :P
The heightmap tiling issue is a bug in three.js. I'll probably have to write my own material to fix it.