I honestly do not like this addition, it seems as a rushed attempt of solving the issue of having to do repetitively lower level dungeons to obtain crafting items, as you currently need like 10 to 15 runs on a lower level dungeon to craft enough bombs for a single full clear run of the next tier of dungeon as soon as you start doing it.
This mechanic itself seems silly, I think you should work on improving the already existing mechanics and issues before adding new content I enjoy your game, a lot, hence me sharing my honest oppinion here, this new content, as it is, looks quite dull