Hi! Sounds like a good idea to compile ideas together to form complexer ideas. The conservativeness in pose and design occurs only due to two reasons, one is you fears pushing it too far, second is you don't know what exactly to or how exactly to push it ? I would suggest you to work more on your understanding of simple forms and to limit the forms you use in illustrations to the forms you really understands. I believe that working on forms would help you because it would give you a "Framework" to make whatever you draws believable. No matter how absurd your actual idea may have been. This really lifts off that fear of pushing something soo far that its unbelievable. Plus, in the long term, focussing on the forms gives you more of a control over what you wishes to put on paper. You can be more intentful by manipulating the shapes, proportions, perspective of the subject to your liking and not necessarily having to conform to the references. So , to take action from here to increase your understanding of form, i would suggest two exercises for you. First is is reference breakdown. Take any one subject of your choice, and break it down into the simple forms that you have practiced and understands. Notice how its proportion and dimensions are different from a standard cube, how its shapes differs . Second one is form manipulation. Take any intresting complex form ( that you can breakdown). Draw a cube. Then try to manipulate the cube in steps of increasing complexity until you reaches the target form. For each manipulation, try drawing it from another angle. If you can't, just practice that and build library for it.