Probes - Elephants in the room?

Late In the development of the Phase 1 Managing Customer Experience deliverables it was discovered  that nearly all the Service Providers interviewed use probes of varying kinds ( Active, Passive, & Intelligent agent) to get an indication of end to end application / service quality across their complex multi vendor, multi-technology Service Delivery  chains. In some cases this was the only way that any form of instrumention of part of the end to end Serivce Delivery chain e.g customer provided networks, could be achieved.

It also emerged that their were some  different philosophical approaches, some Service Providers developed their own probes, some only bought probes from independant probe vendors. The  major concerns seem to be coverage of customer cares needs, the costs of deplying probes, and the effectivenes of the various probe appraoches.

So if everyone uses probes technologies should the notion of end to end Service Quality Managment actually be  simplified by assuming end to end service monitoring, testing and reporting by probes; and solely looking from Networks, Application Servers and IT Infrastructure for simplified reporting of when the aggregate performance of that component of the the e2e Service Delivery chain moves aware from its contracted SLA for a sustained interval of time.

Would this be a way of exploting the elephant in the room?

Might this simplify e2e Serivce Quality Mangement and lower costs?