Super Booster Collection
I like it a great deal! And I'm one of the many who already has all the current packs...
-Rachel-
I think it'd be a great idea. Not sure if the store-side folks would be happy trying to make a "pick three," but then again, they provided the "choose one of these two" with the Architect edition.
I've got all the packs as well, and I can't really argue against offering a new player discount option for them all. A "buy 2 get 1 free" promotion for new players (or even cheapskate existing subs ) couldn't hurt and might help a fair bit.

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I have every edition and booster for this game and I say yes to this!
I buy these things the day they go in the store cause I'm a completionist like that >.> But I do realize there's a lot of people out there who just can't afford to get every one no matter how much they want them. One of my closest friends has only been able to buy the Magic and Valkyrie packs and I know she would love the opportunity to get some of the others.
I think maybe what they could do is offer up packs of two or three for a cheaper price. Considering there's the Architect Edition out there that lets you choose either the Cyborg or the Magic pack, if they offered both at once for less than the Architect Edition sells for I think they'd lose money there. So my proposition is doing a half and half deal. If they do something like this:
Booster 3 packs: $25
Booster 3 pack A:
Cyborg
Science
Mutant
Booster 3 pack B:
Magic
Martial Arts
Wedding (Only in here since we don't have a 6th origin pack yet :P)
Valkyrie and Good vs. Evil can stay separate since they come special with editions already. The 6 above are sold separately (except, as stated, with the Arch-Ed, but that gives a choice)
http://riskovinsheen.deviantart.com/
Light of the Phoenix - lvl 50 Fire/Emp Controller; Snow Panther - lvl 50 Cold/Ice Defender; Dragonfly. - lvl 50 Willpower/Fire Tanker; Magic Minx - lvl 50 Ill/Rad Controller; Dust Walker - lvl 50 Storm/Dark (Sand) Defender; And more...
Few days ago, a friend of mine decided to start playing CoX and asked me to show him some of my costume creations to better understand the cc's strength and diversity. Ironically enough, the process was much more enlightening for me than it was for him, simply because I realized that, having purchased all booster packs available so far, not one single costume I created is booster-pack-exclusive-item free. While I'm ok with such microtransactions, I had a hard explaining him he was to spent $60(soon to be $70 - not counting valkyrie/good vs evil sets) to have the same character creation options with me.
I believe the upcoming release of the mutant pack is a good opportunity to launch:
1) a booster collection featuring all origin booster packs with a reduced price of $40
2) a complete collection (5 origins, wedding, valkyrie, good vs evil) for $70.
3) a build-your-own collection (instead of option 1) which allows you to choose any 5 booster packs you want for the price of $40/45
[The prices are of course subjected to change/are used only as an example.]
So what do you think? I realize most people have already bought at least one pack by now, but this solution is mostly geared towards new subscribers, who the game actually needs.