So basically, the whole series and everything that harry has gone up against so far, has been to try to get Harry to leave the White Council, and join "someone". I would say that sounds like overkill just to get Harry. I also think that it was overkill to set up the outrageously powerful Bloodline spell just to take out EB, but that's me.
Think like the "bad guy"
SF - VS, three eye. Hrmm, we got thwarted there. Good thing we have
FM - Wolfbelts. Tried to take out Marcone(why?), thwarted agian..."WTH is going on!"
GP - Bianca/Mavra/Kavros - "What do you mean our new Countess is dead? "
/leap/
DB - necromancers. "No god/God for us...that guy in Chicagao is getting pretty annoying, maybe we should kill him..." (of course they can't out and out kill him. That would make the WC investigate)
PG - Take Molly/Take on Mab - "what do you mean Summer got involved?!? we really need to kill that guy"
WK - culling of the kine - "damnit! he stopped us again, and we lost some vampires in the process."
SmF - Marcone/Archive - "we didn't get Marcone, we didn't get the Archive. Ok, really we need to kill this guy. Who can we get?"
TC - Shagnasty- "OMFG!!! He survived again?!?! ok, time to be more direct."
Changes -
Maggie kidnapped, big spell to kill Ebenezer, take out the Red King, take out the Fellowship. "All of them? ok that does it" Bang Dead Wizard
All to get Harry to turn? No. For the bad guys though, he's kicking their butts and he doesn't even know what the end game is yet.