ATTN: Custom Lag Tolerance was automatically set to 400 for a lot of people. If your spells feel off, this is why. Here's how to fix it:

/dump GetCVar("SpellQueueWindow")To see what it's currently set at. You want it to be at your normal latency. So, if you normally get 60 ping, you then want to type/console SpellQueueWindow 60This fixed a lot of issues myself and friends were having with game abilities feeling off.