Who cares about the headstart, gold making right now and even after the garrison nerfs can be done largely on a sandbox basis, you don't have to interact with anyone at all and can easily make lots of gold to fund whatever it is you need which is precisely the type of situation that people on low pop servers have been living with the entire time.
The complaint here is that someone with millions of gold has an advantage, and the only advantage they actually truly have now is the ability to purchase things that people with lesser amounts cannot, there's no longer the cornered market problem of expansions past where to even make decent gold you had to be a 24/7 auction rat and trade barker. You don't need to be a player with the ability to corner markets, buyout inventories of items and all of that. You can literally run 25H Cata raids and make hundreds of thousands of gold a week just doing that, if you wish. In Legion this will be extended to MoP raids as well as Cata and even some of the old Wrath raids are technically decent gold for the time it takes to run through them.
Even with them hitting Garrisons in the prepatch you'll still have old raid farming at the very least, so it doesn't require any kind of reset whatsoever and the very idea of a reset is stupid since the smart AH players are going to be the ones who invest the time to research and prepare for this new currency each expansion and jump ahead anyways, ergo you'll always have people far and away ahead of the average player thus totally negating the primary factor for even doing this.