I like a flat suspending bait myself, and I have not noticed any of my Mega's suspending at a 45 degree down angle. Are you using heavy floro? That might be the reason your Megas are doing that 45 degree thing.
Good point on the STX, change out those hooks for sure. And that Eeratic shad is another inexpensive bait that seems to fish well, I haven't fished one enough to gain confidence in them, but it looks like they work well out of the box.
I've found the Megas to be cheaply built for a $25 bait, some of them have a tendency to slowly float (I'm using 8 lb. floro most of the time), the eyes fall off, and the bills break easily. I just don't see the value for $25.