well tbh, if your only concern about it is to be able to hide an APC more easily in there, then I'd say those pieces of lumber are doing exactly what they were intented for...
Honestly if you drive an APC down there and power it down, probably noone is going to find it unless they stumble across it which is highly unlikely in that place anyways!
If your point is that your tank shouldn't get stuck on mere pieces of lumber, then you are completely right, but then the only thing that might happen is that they got replaced with rocks.

I can give you several reasons why those obstacles should stay:
1. hiding an APC or a vehicle down there is actually quite a big deal gameplay wise, especially APC
2. only one team really has access to that part of the map in order to hide an APC there giving them a potential advantage, therefore that kind of behavior should be discouraged
3. as was already brought up, Palisades has way bigger balance issues, the lack of ASF only being half of it.
4. aside of being actually usefull balancewise, the time needed to fix or replace those pieces of vegetation is better spent with more important things
To conclude, it may be annoying if you want to hide an APC down there, but if you actually do you got an almost indetectable ammo/respawnpoint, and since on top of that only one team can really do that in the first place the annoyance is justified.
In fact it's going to stay as is.