The reason Tangrowth was E was because it was felt at the time that Tangrowth, while not being a bad pokemon, was outclassed in both his Physically Defensive and Chlorophyll roles to the point where there was no real reason to use him on a team. While I still feel that Tangrowth is outclassed if you wanted a straight physical wall due to the far superior physical defense of Tangela after eviolite, I now see just how great Tangrowth is as a sun sweeper. I've never used or been on the receiving end of a Tangrowth (I've been playing Rain Balance for so long) so I guess I never noticed how good it was.How in god's hell is Tangrowth E-Rank while Tangela is A?
Apart from it being complete bullcrap to place Tangrowth in E-Rank I think it's debatable wether Tangela is actually better than Tangrowth because Tangrowth got Leftovers over Eviolite.
Let's look at stats:
Tangrowth: 110/110/135/120/60/60
Tangela: 80/70/130/115/55/75
Tangrowth still got better defenses without Eviolite and dont forget it's high HP Stat. Tangela is also far more crippled by Knock Off and Trick (very common in TS) than Tangrowth is. They both handle the same threats and I dont see many threats that Tangela handles which Tangrowth cant.
And dont forget Tangrowth actually has a (good and overlooked) niche as a Chlorophyll sweeper in TS (115 Atk and 125 SpA!). It already had that niche in regular OU, yet small, but in TS it has improved a lot. This chlorophyll sweeper can take a hit thanks to it's good bulk, even when uninvested and then abuse it's great movepool to be a mixed sweeper with Growth. Tangrowth gets Leaf Storm/Solarbeam, Giga Drain, Power Whip, Earthquake, Rock Slide, Focus Blast, Sludge Bomb and Hidden Powers. Because of it's bulk it doesnt actually need Sleep Powder like other Chlorophyll sweepers to function. Most Chlorophyll Sweepers have problems with Heatran which Tangrowth doesnt, and the few ones that are able to cover Heatran are most of the time walled by Ferrothorn which is not a problem for Tangrowth, because even if it doesnt run a SE move against Thorn it can take Gyro Balls unlike the other members of the Chloromob.
So even if you think Tangela outclasses Tangrowth as a physically defensive mon, then you might wanna give the chlorophyll sweeper set a try on a good sun team and come back to tell me it's E Rank material.
Give some more credit to the real Mr. Spaghetti-O.
Blissey in E-Rank is a mystery to me as well. Sure there are a lot of new options for a special wall now but Blissey still handles special sweepers very well enough to be put in B or C Rank.
Because of Tangrowth's use as a bulky sun sweeper that can counter many of the Sun teams common weaknesses that still has to rely on receiving sun support which can be difficult in a weather war Tangrowth is now B Rank.
Blissey I agree with as well. She's better fit to handle sun and hail teams on a weatherless team, and can switch in on more threats than Chansey can due to being less weak to Knock Off and Trick. She also has usable special attack that can be used to threaten a few things Chansey can't. Because of this, Blissey is now C Rank.