[Mobhack]

Engineers are really only relevant in the assault scenario for obstacle removal. A few may be handy if the opposition regularly uses cluster mines or bomblets in other battle types, but really they are a specific tool you only take out of the toolbox in the assault for most folks.

Plus they are usually lacking in infantry ranged combat weapons - often no LMG, and with SMG as a primary weapon. Since engineering skills cost points then if armed as a rifle section then more expensive than the riflemen, especially if no obstacles need clearance.