It is not about the seeding, it's all about the schedule matrix determined by the regular season match-up. If you have 7 weaker teams in one division and you play more games against them, naturally, points in the standing would be inflated while other division teams would face 7 weaker team only twice a year and the opportunity to earn points against them are 14 points while the top teams in the same division would earn a potential up to 60 points against divisional opponents. If you in a division all strongest team, your opportunity to pad up points is not good. So therefore, it is better if teams would go strictly with divisional bracket to ensure the fairness for all party involved. I also am advocating to the league to scrap the Wild Card because 3 games against 5-4 divisional games is also disparity due to strength of the division and the weakness in other in the same conference.
If you sweep all season series, your opportunity to earn points is 4-6 points per team against conference opponents while opportunity to earn points in weaker division is 8-10 points per team, depending on # of games in a season. In a stronger division, you might split up points against divisional opponents and average to 4-5 points per team across the board while you might sweep 6 points on average and over a long run, the top team in a weaker division might earn more points than the top team in a stronger division. While the top team in a weaker division might sweep with 8-10 points and split up other division with 3 points and if you do the math, naturally, the top team in a weaker team would have more points than the top team in stronger division and how is this fair in a conference 1-8 format? Top team in weaker division would earn 11-13 points on average while other top team in stronger division would earn on average of 10-11 points. If you do that average 6 more times with same result excluding matches between the top team between both divisional leader, the top team in the weaker division would run away with 9 more points. That is to me, a greater difference when determining seeding for the first round. You can make the same argument who is deserving of a home-ice advantage in the Stanley Cup final where the opportunity to earn from other conference to only 4 points compared to 8-10 points.
So in conclusion, divisional playoff with no Wild Card is the way to go for one reason: schedule matrix is made for the strict divisional format. If you want to go with 1-8 system, you would have to scrap the divisions and go with 4 games across the board and no extra games against a certain team. If you want 1-16 playoff system, you'd have to play 2 games each across the board with no extra games against a certain team.
I believe that this is the first year in the Western Conference where teams belongs to the divisional bracket without any cross over due to Wild Card system and the result has shown to be true, top seed is deserving of a short series against a team that knows them well in the regular season.