My opinion:
1. Despite graphical changes, Zelda games have essentially been the same for the last 15 years.
Yeah sure, it's a
series.
2. Recent Nintendo games like Kirby's Epic Yarn and New Super Mario Bros. Wii have mostly avoided motion controls while Skyward Sword "bashes you over the head with the Wiimote and say 'REMEMBER THIS!'" (It was a funny quote)
LOL yeah finally they use wii motion plus and it's just great
3. Almost every enemy in the game has a directional blocking ability...
So? I don't see a problem there.
4. Which would be fine if it weren't for the control delay, which often leads you hitting an enemy's defenses (which end up punishing you in turn).
Delay? I never had a problem with delay.
5. Flying controls are horrid
Well, you need skill, but as soon as you did it a while it just works great.
6. Zelda has a personality but little of it
Welcome to The Legend of Zelda.
7. Not related to Skyward Sword, but generally Zelda has no personality and is already a princess or loses all personality when she discovers she's a princess
Yep, see 6.
8. How come Skyloft is conceals the ground below in great clouds but when you're on the surface it's bright as day with clear skies around? Not a criticism really, just more of a funny plot hole
It's a
game.
9. Fi is a terrible assist character. She points out the obvious in "spurious rigor" constantly, and the slow text speed makes it worse.
First valid point in my opinion.
10. The harp sections are uninteresting and boring, involving little more than just waving your hand.
Yep second valid point.
11. Wind Waker had a large, open world to explore, while Skyward Sword is a lot smaller. Skyloft is basically the main island where you shop and tons of floating rocks with nothing but chests that you have to go to the "underworld" areas to open.
It's a bit small, there your right. But it's OK for the story.
12. Additionally, these can only be opened by going to the "designated questing areas", so exploration is basically gone. And there's only three of them.
I still havent got all of them, so you need to search for it.
13. All the characters seem uninterested in the plot of the game.
LOL
14. They copy/paste the same boss fight three times. Additionally, two of the dungeons end with the same boss fight that doesn't even involve using the item(s) you've just obtained.
No problem with it that you fight 3 times against the same boss, shows how dangerous he is.
15. The pirate ship area, however, is good.
Yep
16. Overall: Skyward Sword is the worst Zelda game he's ever played in comparison.
Nah, it was a really good zelda game in my opinion, the story was alright for zelda games and the boss fights were really good.
So, do you think these are valid criticisms?
Not really.