Yeah. It seems like a simple cl.HK > HP.Koryuken is Dan’s best all-purpose ground punish now. Spacing makes stuffing a cr.MP in between give you wonky results. It’s still more damage than Super Dan, and the Koryuken is a really easy link.
Dan can get some really good damage in with a bit of meter now as well by FADCing Gadouken into cl.HK > Whatever.
It’s also really easy to hit-confirm into EX Gadouken FADC Shissou now.
On a lot of (all?) characters, you can do far.LP > Walk Forward > far.LP xx EX Danku.
Also, nothing but good things from my experiments with nj.HP spike. It leaves you +10 at the very least, give or take a couple frames for variable wake up timing between characters. Perfect for a meaty-normal setup, even at midscreen. cl.HK > Koryuken FADC nj.HP is an easy 560 Stun as well (On top of being good damage). This can lead to dizzy on ALL characters if the meaty normal connects.
cl.HK > HP.Koryuken FADC nj.HP … Meaty cl.HK > Hit-confirm (Or even frame-trap if they block it!) Koryuken = 1000 Stun + Massive Damage!
Swap Koryuken for a hit-confirmable cr.MP xx EX Danku and you get 1100 Stun. If you land counter-hit at any point in the combo, I think the stun breaks 1200.
Learn to hit-confirm Counter-hit cl.MP for a very easy link into Shissou. The window is at least 2-3 frames. 
Also, while it sucks that you’re not hitting low, xup.j.LK > cl.LK > cr.MP in the corner is pretty good now. Obviously it’s not mash-proof, but the frame advantage will allow you to blow up techs. If you land xup.j.LK as a Counter-hit, it all combos rather easily. You can even hit-confirm into Gadouken FADC for big damage. A lot of the Gadouken FADC options don’t work on most characters mid-screen, but all seems well for the corner-based shenanigans.
Also, also. Learn to plink nj.HP with MP and HP for a much easier time. The window to land it differs on certain characters. You can’t even land it on Yun in the corner, from what I can tell. If you mess up the plink, and are too early with HP, the MP will come out.

Also, also, also. j.MK and x-up.MK > cl.LK is a blockstring. <_____<