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This looks really cool. It'll be more situational than the Goliath is atm (which is already somewhat situational), but this is more how a Goliath would be used in ww2.
Don't know if you thought about it; but can you force the other squad members to plant a demo charge while the Goliath is sent? - without actually planting a demo charge but only to activate the animation. That would make them immobile.
Small detail; I would reduce the squad size to 3 (2 man + goliath) if it was to keep this set up.