Straight because it looks better and all TES games except for Morrowind has straight beast legs. It's also easier to do so they can spend more time doing more important things.
No bed ownership.
I'd consider "more important things" including bent beast legs. More important things, meaning added features, and bent beast legs being an added feature.
That being said, I personally don't care either way. It always just irks me when forumgoers magically decide Bethesda's time constraints and budget.
As for owned beds, I support them because it's simple logic. I think there should certainly be points where beds "lose" their ownership, such as when the owner is killed or if you join a faction and desire to sleep in their guild hall. But beds, like all other aspects of NPC life, are owned possessions. Personally, I'd be freaked out and call the guards if I found a stranger sleeping in my bed. Hell, I'd call them even if it was my neighbor. People have their own beds, and they surely have no place in mine.