I really dont understand people complaining about AP nowadays. Back with the 20 scaling traits (+0.5% one), I could kinda understand it. As someone with 20 traits were what 11.5% stronger than someone without. But that is not the case now, at all. Now, since we wont be finished with artifact knowledge for a good long while, people cant just rush farm away from you, and as concordance is much weaker per rank than the 20-trait was, zerg farming it wont have that much of an effect. Sure, getting the first concordance will be a somewhat big spike, But in a couple of weeks, AK will be so high that getting the first concordance will be a complete cakewalk.
After that it'll just be a 200 mainstat increase per rank (for a proc). Which is much less than it sounds. Say someone down the line has been playing pretty casually and are currently at 20 concordance (254 billion AP cost),while their friend is at 25 (943 billion). The "casual" guy will have a proc giving 5800 main stat, while the friend will have 6800. For having spent nearly 4 times as much AP, the friend only got a proc thats 17% stronger. That really isnt something worth getting enraged over. Atleast in my opinion