Discussion of rules should go in the general threads. One person thinks a rule is overpowered isn't going to mean anything. If there is a more widespread consensus, then we may look at it.
Minor notes: +2 TMM is 10" or better though, not 12". Terrain modifiers to movement don't affect TMM. A 10" Move unit is a TMM of +2 regardless of if it plowed through heavy woods or clear terrain. It's available move is 10", so it has a TMM of +2.
If it stands still (whether with the Camouflage SCA or not), then it has +0 TMM (or +2 due to Camouflage). But terrain movement costs don't affect TMM.