Does it seem fair that if you're at Level 5 in some category, and you answer "wrongly" some problem in Level 1, your rating can drop as much as 34 points, and yet if you had answered "correctly", your rating won't go up at all? Doesn't that strongly discourage anyone from trying any problems at all that are below their Level?
A recent algebra problem posing a simple linear equation has the so-called "correct" answer of x = 0, when in fact any value of x would be a solution. An Algebra Level 5 user can lose as much as 34 points in tangling with this bogus question.
In game theory, one looks at expected returns versus expected potential losses. Since low Level problems return nothing in rating at risk of a considerable drop in rating, as compared to higher Level problems, doesn't that mean that the best strategy is to avoid the lowest Level problems whenever possible? Especially when a significant percentage of them are poorly worded or even have wrong "correct" answers?
I would suggest that deductions in ratings for wrong answers should be the same or about the same as increases in ratings for right answers.