What it looks and feels more like to me is the explosion is probably only capable of 'hitting' one side of the stab. It strikes the tail on one side or the other of center, and that side blows off, but the explosion doesn't seem to have any effect on the opposite side's stabilizer, regardless that we see it enveloping the entire tail. It's probably that the explosion just doesn't wrap around or penetrate the VStab or fuselage to hit the far side of the HStab, as far as the DM is concerned. It wasn't an issue before, because regardless of which side of the HStab was hit, the whole thing went. Now, it looks to me like the explosion takes out that side of the HStab, but doesn't take out the VStab or the other side of the HStab.
I am not a physicist, but it seems to me that a 30mm hitting the HStab probably isn't going to leave much of the VStab either, but I am not going to pound my fist demanding it be made so.
It can be argued that it's good, bad, or indifferent, but it looks to me like a consequence of splitting the tail for DM purposes. It could also be that HTC just hates the LW planes.
Wiley.