I have been doing JUST that. However, I have the Triton Studio, which has more capabilities than the Triton.
The TS has 2 HDR tracks, which is a very good place to record vocals. You can still use 16 tracks for sampling, etc..., and then if you want you can bounce tracks down to 1 and keep adding as many as you want.
It's not the "end all be all", but I have put together songs on the Triton from start to finish that sound very professional.
I also run my electric guitar and microphone through the Triton, since the mixer/FX is great.