Having dealt with the whole pallative care thing - though not necessarily assisted suicide, I'm a big one on preventing cascading medical interventions that keep people alive artifically. Death with dignity. I know something I have held onto very very hard in the last year about my Dad's death was that he died with his dignity intact, no machines, no interventions in a peaceful relaxed environment with just drugs to help his pain levels. I know he would have never ever considered suicide, but wanted peace.
I think you need to highlight that this is "YOUR OPINION" - its not something the UU has to take on board, but its how you, as a person and researcher look at things. I think the wonderful thing about UU is that everyones opinion is valued and accepted.