Hm you can make a simple beat with non-sequencer and Carla (in NSM) too :)
http://ubuntuone.com/67nrp9TZsbsV9sQ89FodRi
For more complex stuff you could load the midi files in bitwig
It doesn't seems to be hard to get something interesting. It's harder to
create something in your head and put that in the midi-sequencer