I see a lot of things can be run over Raspberry Pi.
Why not provide options for plugin module which can use some Raspberry Pi for additional options like DPI, additional compute power for traffic analyse or more advanced scripting which corresponds with RouterOS scripts?
This may give chances to many users really to do a lot more with MT.
Since such a general-purpose plugin would require a complete pass-through (both configuration and traffic), so why bother to build-in such an add-on board? Use standard interfaces (such as 1000Base-Tx) and be done with it. Making option to build-in such a solution would open a huge can of worms and I don’t think we actually want it to happen.