It's not about 2 v 3 or 1 v 4 in all grades playing at the same venue. It was about trying to line up ABC tv matches and club teams. If you have a look at all grades, not just 1st grade, SRU have kept the clubs together as much as possible.
Uni all Sat at Coogee
Randwick 2 Saturday at Coogee, 1 Sunday at Merrylands
Norths 1 Saturday at Woollahra, 3 Sunday at Merrylands
Rats all Saturday at Woollahra
Easts all Saturday at Woollahra
Manly 2 Saturday at Coogee, 2 Sunday at TG
EW 3 Sunday at TG, 1 Saturday at Woollahra
Southern Sunday at TG
Parra Sunday at Merrylands
Gordon Sunday at Merrylands
West Harbour have the rough road with 2 Sunday at TG and 2 Sunday at Merrylands.
I don't think Bruce would have organised 2 matches vs Randwick at Coogee (2nd & 4th Grades). He would probable prefer to play at Woollahra, a neutral ground.