I think this would be a good idea since the mineverse lobby is in space this would be a great texture pack. http://www.mediafire.com/file/fa4uv5f3dukwft1/MoeXIV's+Galaxy+Pack+(3).zip I recommend downloading it and looking at the cool features like the sun, swords, etc
Since I can't be bothered to get the texture pack, can you put a screenie or a vid of it in action in the lobby?
Changing every item or block wouldn't be helpful. You can offer two resource packs to be downloaded. A standard one featuring different weapons skins (sword, bow, etc) and a more advanced one with blocks would be a more optimal solution.
-1, worse idea ever. I like my own texture pack. That would set tons of other people off and everyone would leave.