Autoupgrade utility - Faster Restore options

Team - Any thoughts or ideas for an easier fallback when using the autoupgrade utility to upgrade the database and convert the upgraded database from non-cdb to pdb?

Here is our use case:

1. Source database is 12cR2 non-CDB database
2. Target version is 19c multi-tenant

Steps followed:

1. Created a target 19c CDB << SUCCESS
2. Installed autoupgrade utility on the database server << SUCCESS
3. Prepared the autoupgrade config file << SUCCESS
4. Ran the autoupgrade utility to upgrade the 12cR2 non-CDB database to 19c and then convert non-CDB to PDB and plug it into the existing 19c CDB << SUCCESS

The autoupgrade utility worked fine and the source non-CDB database is converted to PDB and plugged into existing 19c CDB.