Riot, please rework Elise into an Assassin
Currently Elise functions as an early assassin who builds a bit of magic penetration and then straight tank more often than not. This is due to her low ratios and health scaling Q. As well, her Spider Form W and Elise's E are worth looking at. Elise's kit is that of an assassin's, not that of a front line tank.
Elise's Q is problematic for her as an assassin. Health scaling means great damage for Elise, but the low scaling and lack of need to build damage due to that means Elise players often opt to build magic penetration and then survivability instead; as building AP would have little effect. This makes Elise strong early and fall off as the game goes on and doesn't allow Elise to build into an assassin.
Elise's Spider Form W is very odd for her as an assassin. Its purpose is to aid in clearing jungle, but it feels very strange on her kit otherwise and it's often not used outside of jungle other than for objectives. Admittedly, building AP and utilizing the AP scaling on her Spider Form auto attacks this does fit her kit better; as this allows it to fill the gap between Q bursts. As an AP assassin this works in part with her kit, but tends to feel very unfitting with her burst combo.
Elise's kit best fitting an assassin is most seen in Elise's E and her spiderlings. She has a long range single target stun, like Xerath or Syndra do, and her Rappel allows her to become untargetable and either stay that way for about 2 seconds, or land on an enemy unit. This kind of long range engage and disengage, and ability to become invulnerable to mitigate damage and have high conditional mobility are often seen on burst champs, not tanks. Her spideringlings do help her clear and sustain in jungle; but as an assassin Elise can very cleverly use them to tank aggro and skill shots. They're best used as a skilled assassin's damage mitigation. These abilities do not best belong on a front line tank or most help a front line tank. They're most fitting on an assassin.
I do understand that aspects of these abilities are all helpful for Elise as a jungler and that she could be a very effective jungle assassin throughout the game. However, the lack of damage scaling is what keeps this from being more effective currently than becoming a tank. Becoming a tank doesn't best fit Elise in theme, fantasy, or kit.
TL;DR: Riot, please rework Elise so that she can actually play like an assassin or even a mage assassin for more than the first ten minutes of the game. She has an excellent theme, fantasy, and kit to fit being an assassin. Some players have been asking for Elise buffs and this could be a more fruitful direction than simply adding to her numbers and waiting for her to be imbalancing again.