I've been thinking due the commands that have been added(/speed ,/walkspeed and /nightvision), why not to add potion effects menu? for some detonator rank like sponsor. The potions effect menu might be useful or just cool for people who want to mess with some effects.
i would suggest to add the option of ./nightvision to the creative server, this plugin exisit and it can help good builders in the creative instead of putting glowstone, sea lanterns and etc. i don't know if this plugin is for 1.8 but if it is i think it should be added.
it can be really usefull...