I agree to a certain extent- why do you say its important that we play them at subi though.
Are you saying that the better sides are playing us in perth now and the weaker teams over east due to our tougher draw? Because yes i agree that is an advantage.
If we are in the Top 6, and we play the other 5 once each, and the split is 1 home, 4 away - that is tough. But also possible given that we very rarely play Hawthorn or Sydney in Perth, for example.
If we are Top 6 and play 3 of the top 5 twice, and the other two just once (let's say away) - that is a pretty tough draw, but we are looking at 3 home, 5 away. Much more manageable.
Means
a) better chance to pull points off other top sides
b) better overall record, because of more equitable H/A balance against the top sides
c) more practice against the best