I suspect many (most) programmers also have a rich mental model of their codebase, instantiated by reading and jumping around these mostly linear streams of text (our brains "fold" linear code like amino-acid sequences fold into 3d protein shapes). Mapping between mind-space and editor-space takes a lot of work, and is the source of many many bugs.
Being able to map my higher dimensional space to a richer coding space – to group related functions and objects together, and maybe draw some boxes around them, or toggle various layers of meta-information (such as connections, code paths, etc.) would be amazing.
Please keep doing this.