I'll use this seasons' standings as an example how it should have been done. X= teams qualifies into playoffs.
Blue Bombers: 5-13-0
Only 3 teams within a division should be able to make it to the playoffs. But in this year's case 3 make it in the West and only 2 in the East. The reason why is because in order to qualify within your division, you must have a .500 record of higher. I think that the only time a cross over should tke place is when one division has only one team with a winning record.
The west is simple. 3rd place and 2nd place duke it out to play the team in 1st. In the east since the gades are under .500 , this would change the playoff situation. The Als and the Argos would play each other twice, the winner would be decided by total points combined from the two games. So if the end result of GAme 1 is Als 40 and Argos 20 and the end result of Game 2 is Argos 32 and Als 11, combined the Argos would win the two game series 52- 51 against the Als. I believe it was done like this in the 80s.
Now if it was just the Argos who had a winning season in the east, then as a last resort, i'd suggest the riders would qualify in crossing over and having a two game total point game series.