"heard a few instructors say the IMC rating gives you just enough information to get into trouble. Maybe they have said this but that does not mean that they are correct. "
Then this makes the IMC a red herring, ie. You can do it in 15 hrs, but you won't be safe, so you need the extra hours to make you safe, and low and behold you're over 20 hrs. I wouldn't want only 20 hrs of training and to enter turbulent, IMC conditions and then have to shoot the ILS, popping out of the clouds 100' above DH in rain.....( do IMC instructors teach stalls under the hood?)
I haven't checked what an IMC rating allows with rgds to DH's etc, but someone who thinks they're capable of flying in IMC should be able to do all of the above !
oops, sorry to get carried away....now back to the topic....Yep spin awareness would be good....