The Rough Dissolve transition uses the exact same pattern for every use. For example, try getting 2 images. Then create a dissolve transition between them. Try memorizing the 'pattern' that the dissolve does - i.e., try seeing what specific parts of the second image appear first. Then scrap the entire project and do it again. The same parts of the second image show up first, which means that the exact same dissolve pattern is used over and over.
This kind of effect can be pseudorandomly generated, so i would like a simple parameter in the Transition Effects where I can adjust the seed to make it more random.