A clearer mechanism to indicate when a dragged component will fit into a cell of another node. Quite often when you drag the highlighted drop area is obscured by the node you are dragging.
pow(a,b) and abs(b), max(a,b), min(a,b) nodes would add a lot of functionality.
Then you could do something like.
(((1 / abs((((0 - (y-0.5)) * 6) - ((sin(((((x-0.5) * 6) + time) * ((cos(time) / 3) + 2))) / 4) + pow(((x-0.5) * 2), 3))))) / 9) + (0 - pow((1 - min(abs((x-0.5), abs((y-0.5))), pow(9, 9))))
as seen at https://c50.fingswotidun.com/show/?code=10v-6*u6*t%2Btc3%2F2...
(note - in my thing u and v are shorthand values for 0.5-x and 0.5-y respectively)
A perlin noise can add a lot too but not as trivial to add. I have a compact perlin generator in the first few lines of https://c50.fingswotidun.com/fastStackie.js which uses hashing to generate indexed random numbers, rather than a lookup table that sometimes gets used for Perlin. Feel free to use the code if you understand any of it.