1) The server does not have access to the Nether, so getting Glowstone, Netherrack and Quartz is impossible.
2) Do not trust the warps. Warping to some of them takes you across worlds, and will take your items. They do not return your items when you return to the previous world, so they are lost forever.
3) Staff are not willing to help when a problem occurs, including when you fall out of the world because there is no boundary preventing you from falling out of the world.
4) Staff are not open to any suggestions to help the server potentially grow, resulting in a flawed server that has potential, but no willingness.
5) Staff do not respond willingly to reports of their friends causing trouble, either by harrassment, trolling, or outright griefing.