I'd be a little peeved if Hawthorn missed the finals because of this.
What if you missed the GF because of this?
Do you really think this compromises the competition any more the the fixture already does? Teams can miss the finals, top 4 or GF simply because they have 1 harder away game over a season than another team. If the H&A season was completely equal for all teams you may have a point.
Personally I wouldn't have cared if the AFL had awarded the 4 points to Geelong but I really respect that the Cats offered to split them and that the AFL agreed. I also think you may also be not factoring in that if the game went ahead the result more than likely would have been just as compromising anyway.