I love the system. Thoughts and requests:
Savage worlds. :) A partnership with Savaged.us (https://savaged.us/) would help with monster population. (Making hex-roll work with other systems is likely making the system more modular, and savage worlds would likely need that modularity to be useful)
But, for more fleshed out world-building, here are two ideas:
1. "Connections" or "links", these would be 'Something' in one hex that references the key thing in another hex. This might be a journal, wall warning, treasure map, NPC, etc. It could also be something more substantial, like a key or password for a locked door in a different dungeon.
2. "Influence" Have certain hex's have a trait called "Influence." Such as "Influence, 2" along with a text description below of what effect (RP or Mechanical) that Influence might have, then all hexes within the distance (2) of that hex, have a note saying that they are influenced by the other hex.
Example:
HEX 30: WATCHTOWER
Multiple plateaus separated by seemingly bottomless chasms are connected with fragile rope bridges. The strong wind swings the brides from side to side, making crossing them a terrifying experience.
There’s a recently built and watchtower staffed by kings guards across a seemingly bottomless chasm, where a rope bridge meets an overhang.
Influence, 1
As long as the tower is occupied, hexes within the radius have their encounter rate halved. (Roll the d6 a second time, if it is odd, the encounter happens as normal, if it is even the party encounters a patrol of guards.)
HEX 32: ALTAR
The path here leads to a cliffside, more than a hundrad feet tall. Planks of wood attached against the rocky wall form the only way ahead.
The crumbling ruins of an ancient altar could be found near the base of a steep cliff.
Influenced by:
Hex 30: Watchtower