So, the panel of guys that talk about the game (and the casters) are they professional players in any capacity?.
The panel of 4 guys at the newsdesk are pre/post game analysts. They suck for a reason. From left:
-Bruno: The Dota 2 stats guy. Neither a good player or a caster.
-Maelk: Ex-pro player long ago. Bad caster and generally awkward.
-Merlini: Ex-pro player but he's very good at commentating. The best out of 4. He's like SC's Day9 equivalent.
-James Harding: The head talker. I hate this useless kid and his lame ass chest hair. Neither a good player or a caster.
Except for Merlini, I can't stand any of them. They're all awkward or lame as hell.
Now the following are actual game casters of TI3:
-Tobi & Wagamama: Tobi is known for his great energy and Korean-ish screaming play-by-play. Probably the best known mainstream caster since Dota 2 started. He lacks in actual insight & forecasting. He's best when paired with a color co-caster. Wagamama is low-tier team pro (QPAD Pandas), provides good analysis. Tobi is best when paired with SyndereN of Mouz (eliminated yesterday). SyndereN's analysis is amazing- up there with Merlini.
-Ayesee & Draskyl: There is one guy with a super sexy FM radio DJ-like voice. That's Ayesee. He has a healthy balance of both excitement and analysis. Very professional too, I like him. Draskyl is rather generic.
-LD & Lumi: My favorite and best of the entire Dota 2 industry. Quoting myself below:
Lumi is legit with long ass experience as the content manager of dotacommentaries.com since Dota 1 days.
LD crushed other casters with his insight on the Asian scene last fall while Tobi and others knew nothing about them.
You know casters are good when they make predictive analysis that are spot-on rather than just reading what's happening play-by-play (Tobi).
Lumi, LD, Tobi, & Ayesee are full-on full-time pro commentators/casters. Tobi works for Joindota studio. Lumi, LD are from BTS studio (along with GoDz, Merlini). Ayesee & Draskly works for RaidCall.
That being said, I do agree that everyone mentioned here could be more newbie friendly. They don't elaborate further on why Wisp is good because they assume everyone knows that hero.