Impact assessment on Migration from PI 7.3 to PO 7.5

Hi,

We are upgrading our PI 7.3 landscape to PO 7.5. We need to perform impact assessment. We are having below list of scenario's

1. No ccBPM & ABAP Mapping ( No impact)

2. Java Mapping

3. Customer adapter module

4. 3rd party adapter including B2B adapter

5. Several XSLT mapping

6. Few Standard interface.

Please share your views, which will be impact and requires attention during migration.

Thanks in advance.

Baskaran