No.
Blissey also has the advantage of having Leftovers which gives it better overall bulk. It also can function on sand teams.
Having a passable special attack is a secondary advantage. I can attest from using Blissey extensively, that there are definite disadvantages from Flamethrower (not countering Heatran is a big one) and Seismic Toss is the better overall option.
It's a bit low-priority, but perhaps you should have a quick mention that Knock-Off's buff this generation gives Blissey another 'advantage' over Chansey since the loss of Eviolite is more detrimental than Leftovers. Great write-up otherwise.





