Mega Castform Stat/Ability Idea

Yea this pokemon sucks. My idea for a mega would be that its stats go from 70 across the board to 70HP, 20ATK, 115DEF, 130SpATK, 115 SpDEF, 70SPD. Its ability forecast gets changed to forecast + a double increase to speed when a weather effect is active. Overall, I think a huge buff like this is the only possible saving grace for castform 😭