It looks like Avaya will exit protection still carrying a significant debt - that is going to weigh heavily on the company and restrict its ability to use revenue to fund development. The best sales staff in the world would be hard pressed to make significant sales of stalled products in what is really a shrinking market for corporate phone systems. And with so many developers gone or going, the remaining staff will be unable to make the significant improvements required to recapture sales.
I'm not even sure where the developers are these days - sites that used to be development hubs like Ottawa and San Jose have so few developers left that they don't really have the critical mass required to move a large project forward. Is the development all being done by employees in India and Romanian contractors? In theory that's a workable solution, but only if the Indian employees are experienced and motivated. My experience with them is that they had a high turnover and a bad corporate culture in their offices - their senior managers did not develop the kind of atmosphere that motivated people to do their best.
Maybe the best possible outcome would be for the company to finally sell off some portion so that it can concentrate on one segment and excel there.