Please don't lie in champion ability details
I don't know any other examples, but it really irks me that Sion's ultimate and passive imply he gains movement and attack speed past what he has.
Instead of what the abilities say, they both set you at concrete speeds that cannot be changed.
Both set the speeds at concrete numbers that override any buffs being provided and any items purchased, even when it becomes the case that the items alone would be faster.
It's not cool that he can go from having bought 2.5 AS to being set down to 1.75, or move slower when he presses R than he would just using Homeguard, but the abilities are worded to the contrary.
EDIT: I also think his ultimate needs to be buffed to remove this cap, so that he doesn't get jipped when he buys boots.