I use a map builder with an old version of UI ... it loads quickly which is a useful point when making maps. And besides, I've uninstalled all mods that have nothing to do with making maps such as cockpits, new planes, sound mods and visual mods for smoke and the like.
However concerning object packs - they all work with the map maker. It's just a question of installing them correctly and patiently.
Of course i install all new object packs with my regular game as well, a UP2.0 version. And as long as the mod pack objects are synchronized, there is no problem.
Besides, installing new objects is not much more than extracting and then copying folder(s)/files to a correct location and then copying and pasting a given amount of text into the correct location of another file. With some practice, even when the instructions aren't wholly clear because of a non-English speaker, there is little difficulty knowing what to do. It's always the same procedure.