Just a heads up, the 2nd row has that model D out of bounds by 2hp so you haven't actually got a spare 2hp from this set up~
If you already have the case and want to just put everything into one box, then I'd say continue with the arrangement, but there are definitely cheaper and more efficient ways to "put everything together" onto one slab if that's of interest. Like stacking all the semi-modulars together outside of the case and getting a 2 row rack for the rest of the modules. Idk much about the mpc live 2, but you'd probably need some way to convert from line to eurorack levels, using some external type modules. I like the 4ms listen for this kind of job.