I never liked natural trade offs between an attribute and a power. If such trade offs are natural, I would much rather have the trade offs be treated as powers and defects, both of which you can purchase separately. Make the powers or higher tiers of powers prohibitively expensive and difficult to buy without also buying the defects. The defects could provide plenty of cp, while the powers demand plenty of cp. That way characters that are more or less normal can have powers. Maybe it could be the one skill they have, instead of a dozen of normal skills. They trained most of their life to achieve the very powers than many are blessed/burdened with. Of course, this means that I don't like the async traits as is. You gain mental disorders, weakened mental fortitude, and increased risk of infection to exsurgent viruses just to open the door to async powers. Further more, using async powers causes physical strain to your morph (ie damage). Are you sure you need more drawbacks to being an async? Maybe you wanted a different set of drawbacks. Here could be a trait you could use (I just made it up): Async Mad Insight The Transhuman mind isn't built to handle the sort of powers that many asyncs have gained. While many can make impressive head way while maintaining their sanity, they aren't properly taping into their powers. The first thing they must realize is that they are not in control. They are being allowed to have some agency by whatever forces that be. They could have become some exsurgent horror instead of becoming what they are now. Why exactly did they leave you with agency? They wanted you to choose to walk the path, not force you down it. The changes that were made to you created the door to open, and the vague awareness that the door is there. There was no other way to make the offer, as any further changes would have pushed you through the door. The asyncs with this trait have already opened that door. To walk the path, you have to change the way you think or let yourself be changed. To give a piece of yourself up to make room for something else. To barter for power. To let yourself to be tainted or be blessed. To become one with the world in ways that needs you to give up your agency and human standards of values... or at least that is one way an asyncs has described it. A different async might have a very different idea of what has happened to them. For instance, you can now give up some WIL aptitude points and gain rez points equal to their value. Those rez points may only be used to buy new async powers, which include sleights and traits (including improving the PSI trait from level 1 to level 2). You can even gain disorders to gain new rez points in this manner. You gain a rez value equal to what it might have been if you got it at character creation. These changes happen immediately. Your mind already knew how to change, and was ready to change; you just needed to decide when. I'm not really interested in writing more at the moment. I hope it inspires you or someone else to add to it. Or make changes that work better in your campaign. The point I like is it gives the player some choice of how their async powers evolve, or in this case, gain power by giving up something that most transhumans rather keep.

I actually really like that aSyncs aren't so prone to mind-melt as in other systems, and it makes a lot of sense to me this way around. The way I understand it is that when you're an aSync parts of your mind are simply broken. It's not that they're necessarily strong-willed, but rather that they don't parse that something is horrific - seeing the non-euclidean creature doesn't freak them out because they can comprehend it's form. An aSync can go dancing through the scene of a slaughter and make viscera-angels, not because they're insane but because they don't realize there's anything wrong with it.