Well, they are confirmed to get buffed next patch. The AS steroid buff is the same, but at (4) Wilds, every unit buffed will have their AAs not miss, countering yordles, I guess.
The Wild buff in itself is pretty good actually. 60% AS buff, when fully stacked, is really decent. The problem comes from how the buff itself works. Normally, you have the trait buff up the units when a 1st condition is met, then you give them an extra buff when an extra condition is met. For example, Sorcerers gain extra 40%AP on their spells at (3), but that goes up to 100%AP at (6) Sorcerers.
The problem with Wild buff is that the units that have this origin get the same buff, regardless of whether there is (2), 3 or (4) of them on the board. They [wild units] don't gain anything extra for completing the 2nd condition of the trait. The only ones benefiting from it are the non-wild units with them, on the board. The buff stays the same at (2) and (4), it's just its targeting goes from " Wild only " to " All allies ".
If the buff was something like:
- (2) Wild units gain 10% attack speed, per stack, up to 5 times.
- (4) Wild units gain 20% attack speed, per stack, up to 5 times.
Or
- (2) Wild units gain 12% attack speed, per stack, up to 5 times.
- (4) All allies gain 10% attack speed, per stack, up to 10 times.
then, the buff would be decent enough to be considered more viable since the wild units themselves will get more benefit from the (4) buff.
As for your statement about 4 wild comps being not viable. Actually, there is a 4 wild comp that's pretty viable and a top 3 material. It's a level 7 comp and it's a bit hard to pull off and usually requires good econ skills. This is the comp: (4) Wild + (3) Shapeshifters + (3) Sorcerers + (2) Dragons.

When you reach lvl 8, you can add in
or
for (2) phantom bonus. Usually,
is the 3rd sorcerer that will hold Karthus' items. Or you just put them on Ahri and build another 2 star Ahri on the bench, for when you gonna sell the Ahri on the board for the item swap.
There is also: (4) wild + (3) sorcerers + (3) Shapeshifters + (3) yordles + (2) hextech + 2 Brawlers. A level 8 comp, with cheaper units.

but you gotta stack the veigar (preferably, he should be at 3 stars) and Gnar, here.