You really need to work on your edgeguarding game. Dtilt and Dsmash both send your opponent behind you, so their uses are really only limited to instances when you can get yourself between your opponent and the edge, or when you can combo them back off the edge. Rather, use a combination of Utilts, Ftilts and Fsmashes depending on what your opponent is doing. Also do not underestimate the utility of edge-hogging. If Yoshi's recovery is taking him within range of the ledge, get on the ledge so he's at least forced to airdodge onto the stage, you then have time to set up a ledgehopped and wavelanded edge guard. Sheik's recovery is also fairly easily edgehogged, since the end of the teleportation doesn't attack.
I liked your use of missiles all around, although you still seem to be struggling with how to ue bombs. Don't let that get in the way of actually attacking your opponent. I noticed a lot of times instead of fighting, you screwed around with bombs or missiles and your opponent punished you. It made you seem less serious.
Also, if someone taunts you, on the same elevation as you, within a few feet, while you have a charge shot, USE THE CHARGE SHOT.
