Talk:VPBE/@comment-28018860-20160326180208/@comment-7095057-20160327060952

Another potential reason for the revamp is because Cassi is one of the last few champions that kinda just has free stats. Her passive was intended to make her a late game hypercarry as a mage, and focused on her poisoning and CS with Twin Fang to make that happen.

However due to the problems of having that happen (Players not wanting to play super bully with her), Riot later gave her a slight buff by giving her passive stack generation. The problem that causes however is Cassi now generates them TOO fast for good players.

Now that said: Cassi's current passive gives her too much free stats. Her current Efficency is as follows:

Assuming no runes and Masteries with just a Rylias Crystal Scepter, Cassi would have 100 AP at level 18.

After 10 minutes, Cassi would have 105 AP, which is about 109 free Gold in value

After 25 minutes, Cassi gets another 5 AP to 110 and 25% cdr, a gold value totaling to 218 (10 AP) + 750 = 968

After 50 minutes, Cassi gets another 20 AP, totalling her Gold bonuses to 1402.

That efficiency is insane, and only gets higher with more AP, a Cassi with the following build:

Ionian Boots > Rabadons > Archangel > Rod of Ages > Liandry's > Rylias

Would give Cassi a total AP of 722 AP. 30% of that brings her to 939 AP, a AP gain of 217. 217 AP translates to '''4719 Gold. Meaning Cassi gets stats worth 5470 gold just from her passive at full build.''' There are other problems with Cassi, such as her low CDs and high Mana Costs, which I think are a result of trying to curb her power. You can't nerf her AP scaling more, nor can it be buffed, and tweatking her passive would just pose late game issues that Cassi already has.

It's for these reasons that I think they went with the passive rework. It allows them to work at giving her a unique playstyle, while keeping her late game powerfantasy. It also allows them to tweak the numbers for her skills, adjust AP ratios and do some more interesting things with them now, especially with the poison Grounding feature that they have now.