maby add a another boss in the nether that is only appears in the nether not like the wither

also make it easier to get Wither Skeleton heads

more structures

I like the way it currently is, however I think some changes are necessary.

I find that the way nether fortresses are spread out to be a little too random, seeing as sometimes it takes me five minutes to find one, and other times I spend hours wandering the nether in hopes of finding one.

I find ghasts to be a little underpowered, the fact that two arrows can kill such a monstrosity is a little unrealistic, unless the ghasts were to be made of cotton candy.

I would appreciate it if Mojang would add a little more variation to the nether's terrain, add some sub-biomes. You know, make large cliffs, hills, lakes of lava that aren't at the bottom.