@Bharat Suneja, can you please elaborate on what you mean by "next release of Exchange Server"? To me it means NOT a service pack, a CU or hotfix but a VERSION UPGRADE from 2013 to 2016 (or whatever it will be called).
In this economic climate businesses want stable and reliable products which they can learn, stick with, and rely on for years to come, and they don't have to re-skill their staff every 2-3 years to keep in business. They want to MAKE, not WASTE money. They don't want to constantly fight fires, because it costs them money.
So, again, what existing business need isn't addressed in Ex2010/2013 which MS is working on already so hard to to plug in its next version release, that fixing current issues seems to be secondary? How about focusing on fixing the problems at hand first, stablising what you try to sell now? How about you stop pushing your customers into replacing what they've come to know with new things which are buggy and they don't know, so that they must focus more on learning and putting up with new technology that doesn't bring them any measurable benefits, and actually enable them to go about their business?
Here is a business tip for you guys: Let's maintain well established legacy software for the more conservative while you also offer the latest, not necessarily greatest, for those who are happy to take risks? The world would love you! XP vs Vista/Win7/Win8 is a prime example.