When someone trys to discredit the "incremental forever" approach I always beg to ask the question "why would I ever want to backup a file again that hasn't changed?" Seeing as TSM management class based retention only applies to "inactive" versions of files, or data, there is no risk to not having the data available for restore regardless of how old the file is....and if the file has been removed from the file system the deleted version retention policies will purge it accordingly.
Also, I have yet to find any report that I cannot produce using TSM Operational Reporting since taking the time to fully understand the use of select statements. Adding pretty pictures and colors a breeze (but frankly I find them a distraction).
....hmmm, wonder what happened to our CommVault reps????