Not likely. From the description it would appear that the stug is now a assault gun, rather then a tank destroyer. Considering it has a high velocity gun, it will probably have the high velocity profile.
HE profiles I think are going to be stuff like the sturmpanzer 4, rockets, SU76/ZIS barrages and maybe the ISU152.
Edit: just read this on the official forums from PQ:
"None of the vehicles use explosive weapons. Artillery, some abilities, and future units will use explosive type shells."
I dont think alot of the people that are worried or arent worried have taken into account how much this could impact things.
If the drop off say for the P4 is rather sharp then the increase to the T34 armor may be really strong for example.