The whole thing with "Overpowered" and "underpowered" is that if you are playing on Survival, with say, EE2, once you have a Power Flower you might as well turn on Creative.I like how people say ''overpowered'' or ''underpowered'', in SSP there is not such a thing, and even if its a server, this is a sandbox game, you choose what to do, there is no story, if you want to beat the enderdragon with cobblestone, do it, if you want to kill the wither with potions, do it, if you just want to travel infinitely, do it (unless is a server), if you want to die the fastest, do it.
you choose whatever you want to do.
Thats no fun to alot of people and cheaty
"Underpowered" means that say, if greg made Fusion reactor's output 1eu/t, it would be absoloutely worthless for the cost, so it might as well not be added since nobody would use it, even just for fun, it costs more to get the fuel then to burn it.