If the question asks you 'Is this a positive or negative development?', you are being asked to give your opinion. Therefore, I consider this to be an "opinion" question, similar to the question 'To what extent do you agree or disagree?'.
Notice the use of the word 'or': positive or negative, agree or disagree. You are not being told to discuss the positives and negatives.
Having said that, it is perfectly acceptable for you to write about both sides. For example, look at the following question and my introduction and conclusion below. Can you see how I give a clear answer that mentions both sides?
Some universities now offer their courses on the Internet so that people can study online. Is this a positive or negative development?
It is true that online courses are becoming a common feature of university education. Although there are some drawbacks of Internet-based learning, I would argue that there are far more benefits.
In conclusion, while I recognise the possible disadvantages of online learning, I consider this to be a positive development overall.
I'll show you a full essay for this topic next week.