In my opinion, Ender Pearls should work in Creative Mode, and not take away damage in Survival/Hardcore mode.
I also think that Endermen should spawn a little bit more frequently and always drop 1 or more pearls.
Update 1: Actually, now that I think about it, if Endermen spawned a lot more frequently, then our homes would be gone in a few Minecraft nights XD
Maybe Endermen should spawn more frequently by 1%.
Maybe spawn a little more frequent, and work in creative. They should not always drop one more pearl, though. They should have a higher chance of dropping it or 2.
I also think that Endermen should spawn a little bit more frequently and always drop 1 or more pearls.
Update 1: Actually, now that I think about it, if Endermen spawned a lot more frequently, then our homes would be gone in a few Minecraft nights XD
Maybe Endermen should spawn more frequently by 1%.
The only thing I agree with is that Ender Pearls should work in creative.