When a new rasul&nabi (messenger&prophat) arrives, he receives a Book from Allah in which there are rules to arrange the social life and relationships between people. After the death of that nabi, new and unseen problems start to occur in the society which are not clearly described in the previous Books of Allah. People stay in dark until a new nabi arrives and rearranges the social life according to the new conditions.
14 centuries have passed after the death of the last nabi. The technology changed a lot, lives of people have changed greatly. Because of that, we are in complete dark in some matters. Cloning is one of them.
If we are understanding 33:40 and 40:34 correctly, there won't be any more nabi arriving anymore. So, we won't be able to receive perfect solutions from Allah to solve our problems. In this case, we should try to solve our these kind of unclear problems according to maroof (common sense).
In my opinion, cloning is not good. It will probably disrupt the balance in nature. Evil people will may make human farms in far future. Rich people will clone healty and beautiful children, so a different kind of the racism and social class differences between people will start to appear.
But we can't say that that it is haram, because we don't have proof or enough knowledge to state so. All the current fatwas are jumping to conclusions from ayats that are actually irrelevant of the topic. Cloning will sure may have some good points too; like producing more animals in a state of drought or scarceness. But also, having good points does not guaranty something to be halal - e.g.; alcohol is haram despite having some good points.
Cloning is new to humans. I will be easier and more common in the future. This is inevitable, it will be a fact of our lives. We feel some great problems in it. We need to be cautious. We don't know what future will give birth to. But, it is best not to make claims like "it is haram" or "it is halal". Allah forbids it:
وَلاَ تَقُولُواْ لِمَا تَصِفُ أَلْسِنَتُكُمُ الْكَذِبَ هَذَا حَلاَلٌ وَهَذَا حَرَامٌ لِّتَفْتَرُواْ عَلَى اللّهِ الْكَذِبَ إِنَّ الَّذِينَ يَفْتَرُونَ عَلَى اللّهِ الْكَذِبَ لاَ يُفْلِحُونَ
And do not say about what your tongues assert of untruth, "This is halal (lawful) and this is haram (unlawful)", to invent falsehood about Allah. Indeed, those who invent falsehood about Allah will not succeed.