the idea sounds nice, but i think that this mod should only adjust the pickup and drop locations of inserters and not add any additional inserters. if someone wants different functionality of inserters, another mod should provide an inserter that does that, and this mod should only take that other/new inserter and adjust its pickup and drop locations. this would allow people to select the functionality and get the adjustments independently from each other.
i have some ideas and wishes for other inserter functionalities too, eg a "precision inserter" that works only with single items and has no stack bonus, or a really strong inserter that moves a bit slow but moves entire stacks with one movement. but as i said above, that should be done in a separate mod. the only functionality that maybe(!) could be added in this mod would be an additional parameter that limits stack bonuses to some value between 1 and the researched max bonus.