-Felicity was ruined. I absolutely cannot stand to see her on screen anymore, it's PAINFUL. Catering to the Olicity crowd took this show downhill big-time. And her loose lips sank Barry's ship. MUM'S THE WORD AROUND MERLYN, BRAINIAC! He doesn't wear the mask to look stylish...
-Half of the season was spent investigating the murder of a character who is being resurrected. Not to mention Det. Lance's sudden mood swing halfway through the season because of said character's death. "Uh, oops. My bad?" Assuming he even finds out. Nobody tells 'im NUTHIN'.
-Roy's departure. They seriously cast an actor who wouldn't agree to stick around for more than two years? What, they couldn't find someone who would be grateful to play such a pivotal character? Arsenal was my favorite character on this show until he was written out - despite getting knocked unconscious in every fight he took part in.
-Ra's/League of Assassins. I couldn't have been more onboard with this idea in the beginning - until it turned into a complete knock-off of a MUCH better Batman story. Plus that actor never felt like Ra's to me - no nobility whatsoever, or even much of a commanding presence. He just seemed like a thug dressed in a robe that was too big for him, not somebody an army would follow blindly. Merlyn leading the League is actually pretty cool... being Ra's, though? NOPE. I hope Nyssa takes him down.
-They made Slade look like a dope in what may be his final appearance.
-Did they seriously dismantle the suicide squad that unceremoniously? We never even got to see poor Bronze Tiger one last time.
-Thea's death/immediate revival/sudden sidekick status. What a rushed series of events that was.
-Death as a whole is a joke in the show, almost to the ridiculous levels of Supernatural. Almost.
-Hey guys, uh... what the hell happened to Wildcat? He got hit so hard, he was knocked into next season? Dafuq happened there?
-Ray's inclusion was nice, other than being a budget Iron Man for the duration of this season. Still, he brought nearly all of the lightheartedness that this show desperately needed. Although they made him seem like an airhead at times.
-Laurel actually isn't bad now. The canary cry certainly helps, although it could definitely use some "soundwave" SFX to make it seem like it has some oomph. It's a little goofy as-is.
-GOOD LAWD, THOSE FLASHBACKS. So bad. They were my favorite part of the show in seasons 1 & 2. They only slowed the show's pace to a crawl every episode this season. Dafuq happened?
-Katana/Tatsu was great every time she was onscreen. More, please?
-More Diggle next time... with 100% more "identity concealment" hopefully. "Hey, look! It's Oliver Queen's old bodyguard! Man, he's always runnin' around the city with a gun... helps the Arrow a lot, too. Hmm... wasn't Queen accused of being the vigilante TWICE? Strange coincidence..." Actually, I wouldn't mind if he announced his identity to the world, just so they'll stop dancing around it.