So a Liminal Centaur body with full conversion (cyber arms, torso, and head) would be able to grab 24 points of armor on their body then? Or would you say that wouldn't be the intent of how it's written and limit to the same amount of armor, just needing fewer other limbs/shells, to reach the 18 that was the limit before?
I'd keep the old limit of 18, yeah.
Still not happy with the current armor rules for Cyberware. I understand why we went with what we went with, but they bug me. 
Considering it would take 6.25 Essence to get to 18 Armor using full limbs... not the actual problem. The problem is that Hands/Feet can have 3 Armor each... the solution is eloquently simple, just use similar restrictions as the Bulk Modification Table. *POOF* Problem goes away and you look like a genius for suggesting it.
Cyberlimb Enhancement Table
+1 Hands/Feet/Partial Skulls
+2 Skulls/Lower Arms & Legs
+3 Full Limbs & Torsos
+6 Liminal Body (this one is kinda tricky but that's cause I don't fully understand how it's supposed to work exactly which makes it hard to Balance.) Or a +8 total bonus for each kind of Enhancement..

Kinda force them into Redliner at that point but they should probably already be taking Redliner for the Nuyen & Capacity savings regardless. While only going 2 higher on Armor than 2 full legs, small bones but definitely not game breaking for the sheer investment going Liminal Body requires.