Connectors are complex, and it is difficult to understand or know which connector should be used. For instance, if I want to connect APIs, I will not be able to do it directly. I would have to go to the portal integration to get the data. Therefore, having simplified connectors will make things much easier.

I think more integration with other applications would be perfect.

There are performance issues in terms of scalability and availability.

The product could provide more features. The stability could be improved.

The solution could be improved by simplifying the modeling and the design. We're faced with too many options and too many object types. It could also be more user friendly as a programming language. The product could include more integration with the work bench and integration with Python would be very useful.

In the next release, I'd like to see more interaction with devices - tablets and mobile phones.  It could be a lot more efficient than it is now. At the same time, there could also be improvement in terms of reporting, particularly in terms of administration and monitoring.

 People using SAP BW have to undergo some training to be able to use the product. Complexity can be reduced and could be made a bit more user-friendly. Wizards could be introduced to assist in data modelling and creating data flows.

SAP are constantly  improving the product and adding new features. In next releases SAP have already made things simpler enabling data flows to be copied. 

Technical support can improve by providing support in different languages. Sometimes, both customers and support are not English native-speaking people and the issue/resolution can be misunderstood.

More standard extractors could be developed to avoid the need to develop custom extractors. Process to upgrade to latest versions of BW could be simplified. SAP has already taken steps in that direction.

The complexity of this data warehouse application is huge and makes it tough to manage and deploy it. In general, it requires a lot of know-how and time which makes it expensive to deliver fast answers. It is only possible with huge efforts to deliver really agile processes.