>Base 83 HP, base 100 Def/Sp. Def is not bulky enough now
>Below average 80 base Speed makes it get outrun by almost everything it's weak against
>Base 80 Attack/83 Sp Atk makes it meh, even setting up Swords Dance is gimmicky and doesn't work well
>Movepool is standard Grassmon stuff, Synthesis, Poison Powder/Toxic, Aromatherapy, Giga Drain, Leech Seed, and so on (doesn't get Sleep Powder which would make it better, it gets Grasswhistle which has 55% accuracy)
>Only coverage options are Earthquake, Bulldoze, Hidden Power, and Ancientpower.
>Weak to Bug, Fire, Ice, Flying and Poison, meanwhile Grass is ineffective against Fire, Flying, Poison, Grass, Dragon, Steel and Bug, all of these are common types both in-game and competitively with the coverage to hit Meganium super-effectively
>Game Freak did nothing to buff it, it stayed the same while everything else got better