Form-changing buffs to Elise
I think that Elise should have a short-term benefit to switching forms. For example, Elise can't make much use of her spider form in teamfights since she's not tanky enough, or if she builds tanky, she doesn't do enough damage for it to be worth using. For this reason, I think that Elise should receive a shield when she enters spider form, either scaling with AP or health, depending on if damage or tank Elise is being encouraged. This would give Elise a small window to provide some tanking and make use of her close-ranged damage without sacrificing her health.
Since Elise's human and spider forms now have a bigger movement speed difference, I think Elise should retain her spider form bonus movement speed temporarily when changing back to human, which would decay in the seconds following her changing forms. This gives her a small window of increased mobility for dodging with the smaller hitbox, or making picks with cocoon.
Also, this is unrelated, but Elise's spider form Q should apply on-hits. This increases her burst and improves her itemization options a little.
