A fairly simple feature that would reduce the complexity of most graphs by a huge amount

It's inexpressibly tedious to build nodes for simple mathematical expressions - and most graphs are mostly made up of these expressions.

Something that would take a few seconds to type can take minutes to build and the effect on overall complexity is large indeed.

If any field that accepted a value also allowed a simple maths expression it would make the VFX Graph (and Shader Graph for that matter) much more pleasant to use.

And no - this won't scare off non-programmers. If you can understand the graph for sin(x / Pi) * 100 + y then you can cope with typing it. Let's not fetishize boxes over text as if only the arcane priesthood of programmers understand the latter.