Lively discussion when dead proposals are lined up
"I like this idea too"
Even if you only explain the favourites, having all the ideas in common will spur discussion and, even if all the ideas are lost, the future direction will be decided quickly .
If you had 100 proposals in the same way and only shared a few, it would be a situation of "Well, it's strange, isn't there anything else?" You can avoid this by sharing all your ideas.