We talked about this earlier in chat.. I'll give a summary here as well.
I don't think that events should be designed to please only the participants. I personally enjoy watching these PvP events, just like I would enjoy watching football or something. This is why I'm not a big fan of PM's in events. I generally try to avoid them as much as possible because when things happen 1vs1 in "secret", it goes against the whole idea of forums.
Also apart from being bad for viewers, PM's also make it more complex to organize. What I suggest here, is basically players doing all the work and Organizer just observing, making sure everything goes well. If we used PM's, it would be a totally different, and we would depend on the organizer being online and doing his or her thing.
As for the uniqueness of this event.. a drafting event is a drafting event. The drafting mechanics I propose here, are completely different from drafting mechanics used in the original Draft event, which is all it needs to be unique. If we use MtG as an example, it has tons of different events where the drafting is different, but the actual gameplay is the same. We have the same thing here. It's not like after having one Elements draft event, we have to force all future drafting events to be somehow super unique, by making the non-drafting process different. I like to design events around one "thing". In War it's Vaults, in this event it's the Booster Packs. I like most of the event revolve around these booster packs, and not make some random rules just to try to artificially make the event more unique.
As a summary, I think that having unique drafting method is usually enough to make an event unique. After all, the concept of drafting was not created on these forums, it has been around for a long time, and it's what many people think is the coolest part of CCG's.