Personally, I think the new MPCs are excellent precicely because they have so many options, they are marketed primarily as a 'standalone production centre', but there is nothing stopping you saving a template that is just a drum machine and only ever using it for that, or I had a template on the MPC Key 61 that I've just added to my Key 37 that is 'Live stage piano' that has Piano, Organ, and Electric Piano each loaded and set up so drum pads mute/engage them - meaning I can easily solo or combine,when I'm using that preset the drum machine, effects, sequencer etc don't get touched. I also have a setting to use it just as a Bass multi-fx.
I find them fairly straightforward to use - especially if just focusing on one thing at a time.
I have found that finishing off a song structure and mastering type stuff is easier to do on the Laptop though, the MPC is more of a live tool and an all-in-one for putting ideas down.