But the reverser does deploy, you're correct that the interlock prevent reverse thrust until the squat switchon the NLG is activated. Reverser #2 depoyment + Flightidle induces already an ANU pitch.

We used to fly empty MD-11s out of UIO to GYE and everytime when a co-pilot under training was doing the landing, the IP has to interfere as soon as the Groundspoilers were deployed.

Concerning the CLG brakes; McD (now Boeig BTW) incorporated a reducer in the hydraulic supply lines to brakes #9 & #10 so the brakeaction of these brakes are reduced to 50% of the regular brakes. They did this for a reason.
Although MED autobrake can be selected depending on runway length and a/c weight, it's better to rollout as long as possible to enlarge CLG hardware.