There's absolutely no chance Photekq will change the kits at this point. He has put much thought into them and I think he came up with the gold standard for GMK GBs. In my opinion all future color ways should be done this way!
The idea behind the extra kit is that people who want special keys like ISO, windowed caps or symmetry caps subsidize each other. Otherwise such a set will never hit MOQ.
The truth is if you don't wanna spend 35$ to get the perfect set for you, you don't want it enough 
I think you should just team up with someone who doesn't care for symmetry and just needs the ISO keys or whatever 
It was just a suggestion, I'm not asking him to change anything - I only made a suggestion regarding keycap distribution, logistically speaking because of my own experience, and it's up to him wether he will accept the suggestion or not. As I already said, every keyset offers the symmetry pack in the Base Set so people don't need to spend extra money on useless keycaps. I'm a 60% standard user, I don't need stepped keycaps nor windowed keys nor non standard sized keycaps. I'm okay with buying the useless to me numpad to chop down costs to all of the 100% users, but unfortunately, I can't "donate" R$131,40 in my local currency to the cause (for the Extra Set to get made) in exchange of a single doubleshot gray keycap - even though I really wanted to join the Group Buy and share costs with everyone here. Sadly R$131,40 is just too much for me.
Photekq explained why he decided to not include such keycaps in the Base Set and I comprehend his point entirely, even though I strongly disagree.
Making this division to propel the sales of the Extra Set is a bad move in my opinion. Maybe, it will prevent other people from buying the set, because 60% users who like symmetry will pay $35 for a single 2shot keycap. Not to mention that hundreds of non standard keycaps will be kept in drawers -
but I'm extremely happy to see that this is not a deal breaker to many people and everyone is joining the buy! This is a high end keyset and if you really can afford everything without worries, regardless of the price, well that's a bless! One day I will have money to fund my hobbies without a financial limitation, but I gotta graduate first.
Photekq said that there are more orders for the Extra Set than the Base Set, so you can see that there's no reason for the symmetry keycaps to be out of the Base Set.
This whole deal is a logistic failure to me, as the costs wouldn't rise to a relevant level and the number of sales of the Extra Set wouldn't be affected. It is not justified because every set offers symmetry on the... Well,
Base Set which is called Base Set for a reason. You get the basic keycaps you need to achieve a good luck, for a reasonably balanced amount of money.
Nevertheless I'm really looking forward to the keyset. It is incredibly cute and I'm super excited to see the final product!
Again, Photekq, congratulations for the design!
PS: If there's anyone interested in parting ways with their symmetry keycaps from the Extra Set, shoot me a PM. I'd gladly proportionally share the costs and ship you snacks from Brazil.
