Having that said, i am aware of the fact that surprises do eventually happen, but because UCL is set this way, even when they do happen, it results in a minor difference in overal. What i mean by "the way it's set". I mean that the difference between the top clubs and the low clubs is such that it makes group stage irrelevant, because there is hardly any surprise big enough to continously make a major difference in group stages, therefore in final outcome of UCL winner. If groups were formed of top 16 best teams in the world, as i suggest, any slight surprise (which would happen at the same rate as they do now) would result in a big club being eliminated already from group stages, which, as you may conclude yourself, makes group stages interesting and RELEVANT (the key word here) opposed to right now. In that format, clubs would have to give their all from the very first game = interesting group stages.