Unless you have a need to control additional gear with midi then I'd encourage a deeper exploration of the FC-12.
Others have pointed out many reasons already... But except for more immediately visible button states, I can't think of a benefit the MFC has over the FC-12 (also, no set list feature yet). And the FCs much simpler to configure, can be done in Axe-Edit, etc...
Also, a huge benefit in addition to multiple layouts is per-preset switches... Where the MFC has more switches but their function is "static" the FCs can have per-preset switches so you can take better advantage of the switches.
I am...I'm controlling the drummer's E Drums, and efx for 4 mics, as well as lights if we are in a venue that doesn't have house sound and lights (Only three of 15 casinos in this area don't)
I'm controlling it via a click...CASINOS require backing tracks...
They pay very well..(weddings even pay more but..you're paying for access by a BRIDEZILLA sometimes...lol)
But because they pay well, they get to call the tune so to speak.
I actually prefer the static switches.
I don't have a time luxury on stage.
I have presets for specific uses...Since I"m doing covers, I need to have a myriad of guitar sounds from crystal clear clean to Eddy VH or Tom Schols screamer and about 6 variations of that in between.
I want access to my guitar effects in real time.
I do three 1 hour sets of 15-17 songs per set.
And the genre can go from pop of Today to Bon Jovi so, again, I don't have a time luxury...in those venues that don't have house sound and lights, I'm also running sound while playing...(that's a load of fun sometimes...I use a routing that allows me to switch what's in my ears to the mains feed)
That liquid foot 24 looked interesting and says it's already designed to work with the Ultra I, II, and III.
(and all are out of stock...every liquid foot on their site says OUT OF STOCK...lol)