I avoid using the laptop keyboard whenever I can, not only limits After Effects functionality, but also Photoshop Illustrator, Cinema 4D, etc.
However since having a extended keyboard around is not always a possibility I’ve found that having a numeric keyboard pretty much does the trick, I have a physical one (if that’s the appropriate term) and an app, running on my iPod touch.
Not as versatile as modifying shortcuts (still don’t understand why Afer affects is the only Adobe program that doesn’t allow this), but helpful.