No matter how hard you try to make a software smart and adaptive, there is no replacement for the human element. In the end an administrator can come and tune a few things and set a few variables in a bunch of conf files and do something in 15 minutes which the developer was trying to automate for the whole past year.
While it has obvious benefits, Tuning SANs can be very dangerous specially if the limits and impact of tuning is not well understood. Thats where folks here in SUN have done a really good job of putting together years of experience in the form of a document which describes what all things can be changed and what all are the possible values. The tunable document can be found at: