There is also the age old conundrum where some want to enforce their rules for the good all all because (argument of the day follows).
First of all, Wikidata is very much a child of Wikipedia. It has its own structures and people have endeavoured to build those same structures in Wikidata never mind that it is a very different medium and never mind that there are 280+ Wikipedias that might consider things to be different. The start of Wikidata was also an auspicious occasion where it was thought to be OK to adopt an external German authority. That proved to be a disaster and there are still residues of this awful decision. It took not long to show the short comings of this schedule and it was replaced by something more sensible.
However, we got something really Wiki and it was all too wild. It took not long for me to ask for someone to explain the current structures and nobody volunteered. So I did what I do best, I largely ignored the results of the classes and subclasses. It does not work for me. It works against me so me current strategy is to ignore this nonsense and concentrate on including data. The reason is simple; once data is included, it is easy to slice it and dice it.structure it as we see fit at a later date.
So when our priority becomes to make our data reusable, more open we should agree on it. So far we have not because we choose to fight each other. Some have ideas, some have invested too much in what we have at this time. When we are to make our data reusable, we should agree on what it is exactly we aim to achieve. Is it to support Commons, it is to support some external standard that is academically sound. I would always favour what is practical and easily measured.
I would support Commons first. It has the benefit that it will bring our communities together in a clear objective. It has the benefit that changes in the operations of Wikidata support the whole of the Wikimedia universe and consequentially financial, technical and operational needs and investments are easily understood. It also means that all the bureaucracy that has materialised will show to be in the way when it is.
So my question is not if we are a Wiki, my question is are we a Wiki enough and willing to change our way for our own good.