you are not doing it like I do:icon_chee
I mean hip throws you can gently put them down if you have launched them
a proper osoto or sasae they go flying
and even with kouchi and ouchi people who get thrown try to get away because they don't realize that me landing on top of them if there is separation hurts more then if i am allowed close when it actually doesn't hurt at all (you can help break the fall and roll with it)
I'm thinking more of de ashi barai, which is what most 'trips' are (and yeah, you can send someone flying with that too, but its pretty easy to do it gently). Osoto is, as you know a reap, and sasae is more of a body lock throw, with actually a pretty hard landing. Great throws, not good for throwing beginners with poor ukemi. And actually, for kids osoto is pretty dangerous according the sports physiologists, because they haven't developed the neck muscles to support their head when thrown that way ... one of the Canadian national coaches was suggesting not letting kids (meaning under 10) do it for that reason.
You're right about being able to do o goshi gently, I should use that more with beginners.