The concept of weapon and accessory packs for Gunpla is hardly new, but in my (admittedly limited) experience, they tend to be squarely in the “nice to have” category. The only people who really need them are:
- Completionists who want the option of equipping their mobile suit with every single weapon it ever possibly used.
- People who are really into customization, who want to equip their models with nonstandard weapons and gear.
- People who do complex dioramas, where maybe you have a squad of suits that need to have different loadouts appropriate for the scene.
For everyone else, they’re not strictly necessary (though some of them are cheap enough, and come with enough accessories, that you can amass a nice mini arsenal just by buying a couple).
Having said all that, it is also my (admittedly limited) experience that the Option Sets made for the Iron Blooded Orphans line of High Grade kits turned the idea of accessory packs into something a lot more cynical and capitalistic.