Adding screenshots can definitely increase the popularity of the mod - including recipes, VFX, etc - so people can easily see how your additions fit into the gameplay experience.

Will see maybe in the future.
I'm not that into factorio anymore.
Seeing how limiting the game is when it comes to micromanaging bots via mods kinda ruined my game fun.
Because the way it currently is, bots work well short-medium range and trains work well long range, but there is no way to have train loading and unloading stations in the same network without creating loops.
There is this mod: https://mods.factorio.com/mod/LogiNetChannels
But it has its own quirks and limitations.
The game feels very un-cleanly programmed and very limiting to me when it comes to bots.
So yeah, as long as there is no uniform, cleanly programmed lategame logistics solution, i think i'll stay away from factorio.