I don't know whether it'll make things better - or worse - but I've downloaded the Focusrite drivers last night and will give them a try this pm. I was using it w/ the default OSX drivers.
The 2i4 unfortunately doesn't use MixControl. Well, I say unfortunately, but w/ 2 inputs and 4 outputs, there isn't much need. And I like having everything at hand, via hardware.
For monitoring, it has a knob right upfront that let you chose between the direct input for no-latency monitoring or the software processed signal. Or create a balance of both. Pretty handy.
Similarly, you can chose whether you want outputs 1/2 or 3/4 to feed the headphone outputs, and that outputs has its own independent volume knob.
The Fast Track was absolutely basic and I never really thought of complaining about it because I picked it to do something and it did it ok. But messing w/ the Scarlett, it's a different ballgame - a lot of nice little options and much more refinement.
If you're more into traditional electric bass sound, you may not find much fun in Bass Station - which is a
TB-303 and then some sort of instrument. Here I have projects for every type of sound - electro, electric, acoustic. I'm sure I'll find a use for it at least once - and then go back to my usual instruments.