Well, you pointed out that they would save points by having a single bloodline, which I thought made sense at first until it was brought up that having a mixed bloodline does the same thing, but also gives you the ability to spend points on a second damage resistance. Then on the second page you said that the rest of the Elemental Affinity class feature still worked fine, Derren pointed out that that didn't matter since the resistance thing was what they were talking about fixing. You reiterated that having a single bloodline would save points, Derren reitterated why it wouldn't, you rereitterated that it would, Derren rereitterated that it wouldn't, you said that it would help because a single bloodline sorcerer would be unable to make the decision to spend points on the extra resistance and thus save points, and Derren said that didn't make sense since a mixed bloodline sorcerer can simply not make that decision and save points just as easily. On the third page you explained how there are different ways a player might measure power, and that in some people's minds being able to sacrifice offensive or defensive capacity for the sake of boosting the other would be worse than not being able to do that. Therefore if a player knows ahead of time that a particular option will never be necessary, they can choose to lose it and be just as good as someone who choose to keep it. Then there was some more back-and-forth, you started talking about how not everyone views this disadvantage as a problem and that if they don't want a particular feature it's fine for them to not take it, I agreed that that was fine but not really useful to bring up here since mechanics were the issue, and then just now you brought up that someone might choose to be a single bloodline sorcerer for thematic reasons and not mind a minor mechanical drawback, which is true but also not the issue.