It has something for everyone, mostly for lawyers and corp gov junkies. We find a couple of nuggets for plain old investors, mostly related to how to pursue proxy contests.
Most of all, Delaware will allow BoDs to use a poison pill based on only a relatively slight threat that an investor will seek control without paying a control premium. So, wise investors will remove all sign of those threats - don't even think about control, and certainly don't write it down anywhere.
All investors should read the decision, especially the first 30 pages. It narrates a fascinating case study of egotistic investors, stubborn executives, and an obtuse BoD. For some interesting (and slightly technical) detail, read blog posts by John Coffee and Gilson and Gordon.