The Cisco and Genesys teams are checking, and creating/contributing to, the negativity on these message boards daily as a FUD/sales strategy.
I know because I'm one of them.
I feel bad for my ex-Avaya coworkers that are taking this stuff seriously. Customers are reading this as well, which is why there are competitive teams stirring the pot. There are some really good and loyal people at Avaya and I don't support these types of campaigns.