Hmmm... A healthy debate! ...My turn...

<thinking out loud>
Genesys are market leaders in their interfacing technologies of traditional and (perhaps) SIP/VoIP voice interaction engines for CTI - they are not market leaders in CRM, IVR, BI or anything else. To buy in the technologies and apply them to their Market Leading product (singular) does not make them the market leader in anything else but CTI, as hard as they might try to push the other products...
Also, over the years, I have noted that it takes them longer and longer to integrate new ("bought out") Solutions into their Framework Layer. I remember working with Outbound on what looked like OS-Warp screens splattered all over my Desktop (5.2?) and WfM which came with a completely different interface to CME (6.0?). GVP/VG are more candidates that could do with an overhaul to allow them to be administered via the standard Genesys Framework but they work in a fundamentally different way. In actual fact, with the diversity of the product portfolio from Genesys, I've always been a little perplexed as to why;
WfM is pretty much a "stand-alone" Solution - it has it's own Framework, Configuration Manager, Engines and Real-Time and Historical Reporting components. Many of the configurable items exist outside of the standard Genesys Configuration Environment and whilst you can configure CCPulse+ and CCA to work with the available components, it is not recommended, since WfM has it's own "versions" of these items.
GVP has (to my knowledge) no reliance on the core Genesys Framework.
ICON/Infomart [i]and [/i] CCA/Hyperion are both "on sale" as seperate product suites - one Volume and the other Interaction Reporting...
With the general exception of the core product (ERS/NRS/TServer/URS) and perhaps Outbound Voice (OCS/CPD/OCM/Dialogic) and CCA, everything else seems to have been "tacked-on" to the Genesys Framework and a common interface appears a long way off... unless that is about to change in v8...?
</thinking out loud>
Tony