resummoning the enderdragon is maybe cool for survival but also pretty overpowered. End rods look neat but aren't really something worth spending hours and hours updating to 1.9 and changing everything so everyone is happy.. All the stuff you're talking about is like only cool for survival and with an amazing 5-15 people on there at all times I don't really see it being worth it... Theres also just so much bullshit and trash coming with 1.9... If you really want to play 1.9 just go into a single player world, you'll get bored of it real fast.. lol