Yeah, but Sara chose Oliver over him. He was as mad probably with both of them.

Waller is returning soon and they could reveal that in her next episode. I also want to see Diggle telling Oliver that A.R.G.U.S know about his secret.

I really hope they would send Laurel away to Starling City at the end of this season or the beginning of the next one, and keep Sara as the Black Canary. Katie is the worst actress in this show imo and I think Laurel is the biggest problem this show has now personally.

Laurel could've claimed she needed to see Resik due to a pending investigation at the DA office.

I guessed she was his mother from the moment her name showed up so I was expecting that twist personally.

I'm having troubles making sense of the "crazy aunt" storyline. So, this kid kills his father, says his mother did it, says his mother is crazy, and everyone believes him and lock her up instead of him? Really? Okay then.
Unless, Blood lied about that too and killed his father as an adult. If his parents abandoned him…

Exactly.

I don't remember Oliver sharing his situation with Felicity in this episode and how could she know if he doesn't tell her?

Ivo's motives were that Sara chose Oliver over him. He would have probably continued to kill the two of them after Shado if Slade hadn't shown up.

Ivo played that game because Sara betrayed him for Oliver. He trusted Sara and shared his plan with her, and she hurt him.

Slade wasn't the "man of means" the Count was referring to. The Count was referring to Blood. He was hired to kill the Arrow and Slade warned Blood not to go after Arrow, ergo he wasn't the one who hired The Count for that job. It was Blood working behind Slade's back there.

The producers are the ones that offered The Flash's idea to the CW, so here's your theory is going right out the window.
And this season has a very interesting plot so far.