I'd give your DDD like a 2.5/5.
You grab too much not only says that you are grabbing too much, but it also implies there are other things you should be doing. There were plenty of times where you could have gotten a free Ftilt and you didn't. You never used Utilt which is one of DDD's most devastating attacks.
You didn't pursue TL with aerials, which I think, would have been ok bc I think fair out prioritizes TLs Up B. You should have followed up your down throws with Ftilt.
One of the most important things you were missing was SHIELD GRAB. Running grab ****s you over if you don't shield and you loose range for no reason. Shield after dashing and before grabbing and you won't leave yourself open for punishment.
Another thing is... that link was kinda, really bad. =/ Just saying....
The one thing I did like was that you always got your one hit in after a grab. ^^ I always forget to and I think its a good habit.