I remember that I argued for Ness's Dtilt to be higher... I meant up to C-tier not A-tier or even B-tier. Ness's Dtilt has none of the range or the setups of Ryu's light Dtilt. I think Ness can Dtilt to grab, but once again, much shorter range than Ryu's.
I would also argue in favor of Shulk's moving up to B-tier with Ike and Bowser should probably go up to B-tier too. Bowser's Dtilt is average in startup at 10, hits hard, especially the first hit, and has arm invincibility for both hits, 10-12 and 20-22. So, 6 total I-frames that cover the entire hitboxes of both hits. It can connect both hits, but probably only at lower percents. That's 25% from a frame 10 Dtilt. It's probably more like Ganondorf's old Nair, though, where it's more likely to hit once which is fine and makes sense since the first hit doesn't have set knockback -- it's just angry, regular knockback on a 14% hit -- and there's a 7 frame gap; Bowser's Dtilt hits 3(7)3. I think it can hit below the ledge, but I'm not sure about that.
Finally, I want to argue in favor of Yoshi's Dtilt, but... maybe not. Decent 8 frame startup, average 3 active frames, low 14 recovery frame, and 2 hitboxes that send at a shallow 28 degrees. Yoshi uses his tail, so it's probably (naturally) disjointed. The only things going against it would be its low damage, 5% / 4.5% / 4%, and knockback, 65 base and 30 growth, which with its low damage, it wouldn't KO in the first place. It would probably be a good whiff punish to sweep under, but not a rewarding one as Captain Falcon, Ganondorf, Ike, Mewtwo, or Samus's.
Oh, and Luigi's should drop down to a F-tier. Actually, everyone, Palutena and Wii Fit Trainer, in F-tier should move up to D-tier, and Luigi should be in F-tier. Pally and WFT's Dtilts at least have power and range not to mention that Pally's rocks high active frames and is recoilless. Luigi's has none of this. No power, no range, nothing special to make it stand out. The only thing his Dtilt has over the D- and F-tier Dtilts is it's fast, but that's not enough.