Lodestone, The auto dismantler is not possible in any way shape or form, but auto pickup all could be done. On a side note did you know that holding the pickup button down picks everything in the vicinity up quickly?
desertedsun, sorry, you have to reinstall the whole mod. Well, I suppose it would be possible to separate them into their own .mod.zip file. Although that means that there would be more .idx/.dat files, which isn't that big a deal I guess. However the idea behind keeping them together was to minimise the amount of changes needed to be made. For example, the improved sniper rifle mods modify items.txt.cooked, that would mean that the separate .mod.zip file would need to have a copy of the file and if it was then modified in Revival, the version in the sniper rifle mod would need to be changed as well.
Anyway, even creating a separate movement speed mod, changing the movement speed would still require reinstallation of the movement speed mod, so the only thing that would change is the reinstallation time.