We have plenty of guilds that run premades on TEH imp side: <NSFW>, <Dread Court>, <Shadow Council>, <Anâthema> (i think that is how it spells, sry if i got it wrong). I won against <The Core> 3 out of 4 times i have faced them today, with a mix of NSFW and Dread Court premades.
It is a good initiative to create a pvp guild and i welcome any kind of organized imp side pvp, but i think you are mistaken when you say Imp side is abandoned, that it only run pugs.