Hello.
Sorry for the late reply.
1) As mentioned earlier by Roy, we are working on improving our endpoints, so they can respond faster and deliver more specific information instead of everything as of now. One example of this work is the neXtGen SalesOrderService which includes v3/salesorder, v3/inventory and v3/customer
More info about it can be found here: Getting started with the first neXtGen service: Visma.net ERP Sales Order API
2) As you are mentioning, we are running in a multi tenant environment with shared resources, and we have to have in place some measurements to ensure the quality of the service. That is the reasoning behind having a concurrency policy. We have not landed on a number yet, but it will most likely be a percentage of the resources available in the environment.
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