Johnny,
We are looking at a similar scenario as you may have guessed from previous postings. The default routing question is covered as the Meridian will do this as part of the core ACD functionality of the switch, such that even if Genesys is controlling the routing and fails, then the Meridian will see the timeout for a routing command and then route to the default.
Genesys will not be invisible to the agent, and on the basis of discussion here, is unlikely to be invisible in the short to medium future. The only invisible solution to CCR, LINK, MAX going out of support is to go to Symposium.
Rory