I'm not proposing any major clarification - I just think a line should be added in future rulebooks in order to standardize the codex. For every other trait that does not affect conjurations, there is a line at the end of the codex entry that explicitly says "does not affect conjurations" (except slam, but that one is pretty obvious). If it were not for this trend, the fact that it refers to Creatures would make the rule obvious; since there is, and it goes against the trend, there may be some doubt for new players. There is no reason not to add such a line to weak, so that there is no question in future.