The moral of the story really is:
Don't go upgrading blindly expecting performance increases. Monitor the system, identify bottlenecks, fix the bottleneck.
People who have the kind of responsibility and money to throw hybrid flash/disk SAN's at problems without bothering to see where the bottleneck are EXACTLY the sort of people who shouldn't be in charge of that kind of hardware / responsibility.
Blindly-part-swapping "technicians" do not a good IT department make - unless you're working for PC World, apparently.