I agree to this, this is not a build for someone who is either new to the game, or new to Sylvanas. It's heavy emphasis on team work, peeling and chasing for your team, and increasing damage for them while still being able to do normal Sylvanas things.

Envenom and Blood for Blood require you to be in close range of the targets, and you are losing out on two of the best talents for Sylvanas that go into synergy with their respective builds. For the main build, you would be missing out on Paralysis, which increases the slow duration on your targets. Longer slows = harder for the enemy team to re position, chase, and flee. What you get out of this is a single target burst damage ability which is only useful on squishy targets that...

I haven't gone up against Illidan or Tyrael a lot since the patch. I'll be updating this guide as I get more information, but need to test it out myself to see.