Lan9500 to Switch (KSZ8795) MII wiring
You need to consider that the data sheets should describe what type of interface is on each device. (i.e. if TX is an output from a particular device or an input). If that is not fully apparent from the data sheet then you should be considering talking to the support folks from the device manufacturers.

I have done designs with RMII both with TX->TX type connection and the crossover TX->RX type connections. It does work.

Another important consideration with MII (and RMII if that is an option that you have to reduce number of inter chip connections) is to carefully consider your reference clock. Ideally you have a clock source that you then route to both devices with equal length routing and very careful attention paid to the signal integrity considerations to keep clocks clean without ringing.

You also want to try to keep the routing of the MII (or RMII) connections with equal length routing for all the signal and control wires.