You can try Figaf in your migration projects for free. Just start a free trial and you can get started with the tool right away. Figaf covers all the needs you have for your migration projects.
I have seen some customers being recommended that they should modify the ICOs before they perform the migration. The reason is to fit the ICOs to what the SAP migration tool can handle, for example the number of receivers. If you do modify the ICO before a migration, you should roll it back afterwards. Notice there is a 5%-20% chance that you will miss something and then the change may by mistake be transported to production.
The simplified ICOs can then be migrated with the SAP migration tool for the migration. But it also adds overhead and complexity to the migration process, allowing more problems for the migration.
Also it brings a challenge to understand how to create test cases for the given scenario and document if everything has been moved.
With Figaf, you don’t need to modify the ICOs before migration. You can just select which part of the integration you want to migrate if there is something you need to migrate.
Then it is much faster to perform the migration without impacting your SAP PI system. The Figaf tool does support adding routing for most scenarios which enables you to migrate the integration without problems.
SAP keeps developing its migration tool, so check its documentation and roadmap for what it supports today.