THERE IS NO SUCH THING AS A PERFECT SYSTEM. They are designed to give advantage to some teams over others.
Assuming each team has a 50/50 chance of winning each game, under the current McIntyre System, each teams chance of winning the comp is:
1 18.75%
2 18.75%
3 15.625%
4 12.5%
5 12.5%
6 9.375%
7 6.25%
8 6.25%
I like that the higher you finish, the better your chances. The NRL also has Origin which can distort where teams finish. You may get a strong team finnishing low. This would very slightly skew these odds down the ladder. This makes it a fairly balanced comp where anyone can win. And in a game where the salary cap is so important, isn't that fair?
The main concerns people have is that 3 and 4 can be eliminated in week 1, and the home ground advantage to a low ranked winning side in week 2.
The first concern is unlikely to happen, and in the case it does, 3 or 4 had a chance at going to the prelims and missed it. Also, playing "weaker" oponents gives them a possibly better than 50/50 chance of winning. You can't expect to be in the Grand Final if you are incapable of winning games.
The second is an issue of scheduling. Why not say the highest ranked sides in round 2 play at home? So this year that would be Raiders v Tigers at SFS, and Penrith v Roosters at Penrith. I personally have no issue with the way it stands as is now. You have to win to be rewarded.
A finals system (regardless of who plays who, especially with a salary cap) is always going to advantage the team with the best form at the right time of year, coupled with a lucky run of opponents with injuries and other issues. Think the St George v Manly match up in contrast to St George v Parra last year.
This is why I think the Minor Premiers should be better rewarded, and that prize more sought after, like it is in the A League, or Premier League. Two rewards: one for the play-off champion, the other for best team through the year.
Compare that to the old ARL system (current AFL):
1 18.75%
2 18.75%
3 18.75%
4 18.75%
5 6.25%
6 6.25%
7 6.25%
8 6.25%
I don't like the strongest sides (and most likely grand finalists) meeting in the first week, and that 8th has the same chances as 5th. High ranking losers getting home games too is a bit dumb in a play off. Its about winning, why should a loser be rewarded? The second chance is reward enough.
A sudden death system would see all teams sharing a 12.5% chance of winning.