There isn't a random blue node that I'm aware of but I have requested it. Also a range no where you can set min-max ints and it draws and random int.
But that doesn't help almost all TG nodes not accepting a scalar as a seed input.
Another request of mine too; expose seeds to scalar inputs, and vector inputs to constant vectors (like transform input, transform merge, vector warp, clouds, sss, etc)
Matt said its a lot of work and some of those shaders he hasn't touched in over a decade. But the benefits sure seem to outweigh some time spent. It literally makes TG all that more powerful with functions.