From what I understand, the SAP Cloud Platform is for implementation on AWS or Azure, and it's not meant to be a full-fledged cloud solution, so while using the platform, an area for improvement is that it has fewer offerings and is less flexible when compared to AWS. AWS has a lot more flexibility than the SAP Cloud Platform.
I've also used Azure in college and AWS in between, and I prefer AWS over the SAP Cloud Platform. The only reason I would ever stick with the SAP Cloud Platform is to create applications integrated with SAP or with other companies within SAP, such as SuccessFactors.
When you go into the SAP Cloud Platform web page, it's a bit bland and has relatively limited offerings. For example, there doesn't seem to be in-house MongoDB support, but I realize there's in-house support for the PostgreSQL database, so there are fewer offerings in the SAP Cloud Platform. Yes, you can always go for a database on the actual MongoDB server rather than depending on the offerings of the SAP Cloud Platform. However, it's still better to support MongoDB from the platform, so payment is consolidated, rather than going to a different location to make a payment.
Another room for improvement in the SAP Cloud Platform is the need to create an SAP subaccount if you need to use the platform unless you have an SSO login by Google or if you're using a different identity provider such as Microsoft or Google. Instead of requiring dependency on SAP, it would be good if users could use the SAP Cloud Platform even without a subaccount on SAP. For example, when hosting an application on AWS or Azure, you don't have to create an account in Amazon or Microsoft. You can still do it using Google. You can use almost anything, so I'd like SAP to improve by removing the dependency, particularly the requirement to create an SAP account to use the SAP Cloud Platform.