Moscow is not the only mission without a local decision maker. The fact of the matter is that many missions do not have a local decision maker. That does not necessarily have a huge impact. What is important is having the number of decision makers needed to be able to make the required number of decisions annually.
A person applying for the position of local decision maker must have a certain amount of experience. For instance, that person must attend a six-week course in Canada and, ideally, be under supervision for a period of time before being allowed to make immigration-related decisions. In Moscow's case, no one with those credentials was available. In some of the other countries, we simply do not have enough confidence that local decision makers will be able to withstand pressures from their surroundings.