|Todd Morgan Venture-Captain, Nebraska—Omaha|
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I'm going to try and come at this question from a global angle. I have been a member of 5 Organized Play campaigns: Living Greyhawk, Living Forgotten Realms, Living Arcanis, Legends of Arcanis and Pathfinder Society.
Going from memory of the rebuild rules, Living Greyhawk didn't allow any, Living Arcanis allowed some, Legends of Arcanis allows it until you stop playing Intro scenarios, Living Forgotten Realms allows a rebuild every level and PFS allows a rebuild until your level 2 and then has implemented rules for limited retrains through errata or Ultimate Campaign.
In terms of what is allowed from sourcebooks, LFR and Legends of Arcanis allow pretty much everything, Living Arcanis marked in the book what was allowed and Living Greyhawk and PFS have FAQ/Errata/Other documents that explain what is allowed.
Out of all the campaigns, Living Greyhawk was extremely restrictive with the large campaign "document" (I say document, but I really mean small book), PFS has a much smaller campaign rules document, followed by LFR and both Arcanis'.
In terms of overall campaign document complexity, rebuild rules and additional resource allowance by far the most restrictive campaign has been Living Greyhawk > PFS > Living Arcanis > Legends of Arcanis > LFR
Now take a look at the success of these campaigns. I don't think it's too far of a leap in logic to assign a strong level of correlation between the level of restrictiveness of a campaign to its overall success.
To the OP, there is one option that you forgot to add to your list of options to the campaign (which is also the most restrictive): no rebuild whatsoever.