(Blackjack question) Do you agree with the double down and split strategy in this question?

 
 

I’ve been using the strategy chart off of http://wizardofodds.com/blackjack/strategy/4deck.html and it has really brought my blackjack game up a lot since I first began playing not long ago. It’s a great chart and teaches a lot….I just wanted to know if some professional/really good blackjack players agreed with some areas of the chart here though.

I find that some of the double downs are aggressive and maybe a little too loose. When I have a 11 I usually don’t double down against a dealer 10/9……and when I have a ten I don’t like doubling against a dealer 9.

The aces double downs look good to me.

I don’t have a lot of knowledge about splits…are they ok here? I normally only split aces.
to legfu: lol that wasn’t really what I meant. I was just looking for some good players on here to give an argument that would prove my thoughts wrong basically.