The Bourne Legacy:
If it had no Bourne-branding, it would be a decent if unremarkable thriller. It doesn't have the same intensity and action of The Bourne Trilogy and you don't even learn much new in terms of the backstory. There's nothing particularly bad about it, but also nothing memorable, so it just seems an unnecessary use of the name. It was more like another Rachel Weisz film (Chain Reaction) about a man and woman on the run from the authorities, rather than a frenetic and brutal man-against-the-world action classic.
Looper:
Strangely, the time-travel plot is probably the least interesting aspect of Looper. Visually and set-piece wise, it doesn't stand out either. It's low budget seems obvious at times. It's quite slow to get going too. But it eventually turns into something unexpected. The character interactions are more interesting than the sci-fi elements. Some ideas could have been explored in more detail, but overall it's a quite excellent film and another impressive performance from Joseph Gordon Levitt.