Pardon me, a strongER character. The fact that dumping XP into characteristics always results in a strongER character than if you did not is a fault of the system.
The system is such that dumping more into characstirics at char gen does not give you a statistically significantly stronger character. Unless I read LethalDose's math wrong I think he showed that the difference is there but that it's so small as to be unimportant. Maybe I should go back and reread his math but if it's so minor as to be unimportant .....then I don't think we are talking a system fault.
Also I question the logic in defining a character strong based purely on the result of dice. More so when the dice make it possible to win even while failing.
I read the rules, and skimmed the talent trees. When I read the section that said "You can only upgrade characteristics with XP at character creations, after that you upgrade them with talents," I did not immediately rush to the conclusion "I must buy characteristics and only characteristics if I do not want a suboptimal character." Instead, I figured that this game was balanced such that you could just as easily upgrade your characteristics with talents as you could pump it up at character creation, and neither route would punish the player.
The system says spend your xp on attributes at char gen. If you don't listen you can't blame the system. It point blank lets you know the deal up front. You yourself admitted that you skimmed the talents. If you hadn't done that you would have seen that you couldn't easily upgrade characteristics. Again the system is not at fault for your lack of attention to detail.
No one likes to be punished for the crime of not having 100% system mastery the first time they make a character. And yes, having a 1/20 chance of failing at something where you otherwise would have succeeded except that you didn't have that system mastery right at the outset IS an imbalance.
The system doesn't require you to have 100% system mastery. Just read the entire char generation chapter. Also a 1/20 chance if failing at something is not a big deal. There is no way you're going to get a full on 20 here. No system ever does that. You're basically trying to create an imbalance where none really exist.