Legacy of the Void is an excellent conclusion to Blizzard's trilogy. While one can get impatient with the familiar mission structure, it's impossible to argue with the excellent faction balance and action. As a genre, real time strategy games have lost a bit of appeal and the StarCraft 2 trilogy doesn't move them into new territory. Let's leave that for the next generation. Right now, there's Legacy of the Void. It's all good.
Thanks to these problems, a visually charming and potentially enjoyable - if thoroughly unoriginal - tower defense game becomes much harder to recommend. Of course, grinding to earn upgrade points is always an option, but the levels aren't that charming. Tower defense games aren't exactly gaming junk food, but their secret is in rapid pace and a steady forward progression. Get that wrong and not much else matters.