I personally havent sailed in the Hobart.. But have been in a Albany in a pocket maxi.. We hit 45-65 across the deck and 30 meter waves. Not long swells but short sharp walls.. Up one and launch off the top and drop 10 meters..
Not a nice time.. My skipper retired from a long highly successful international career after that race..

No not the force 12 the solo guys just experienced in the southern ocean. But scary enough to make one look for the EPRIB but we didnt have them back then..

Yes the two currents and a front is localised.. However to get to hobart the Rumbe line goes right through the area you described.