Okay
Level 5 iron generator
Cost: If upgrading an iron generator from level 3 to level 4 costs 50 gold, the cost of upgrading it from level 4 to level 5 will be too expensive
not to mention, that iron is only useful for food and blocks, because if you have a level 4 iron gen you probably have level 4 gold gen and a level 3 diamond gen, so you will not benefit from it. Personally, I prefer leaving my gens as level 2.
Level 5 gold generator
Again, cost will be too expensive, if 25 diamonds are needed for level 4, imaging how expensive it will be for level 5
plus, this will negatively affect eggwars in general, because of how cheap are gapples and arrows, this will encourage people to chug gapples in fights which is pretty annoying, plus it will support camping with tons and tons of arrows.
I'll say a no to this suggestion.