UPS-friendly 1x1 loaders.
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
It would be nice, if we can get stacking loader variants for belts from Matt's Logistic too, so we can profit from stacking on those belts too.
I understand but I really have no plans to touch the miniloader for a while unless there is a glaring (crash) bug in the just released 0.9.0.