Scouting is fun and social, which is why we joined in the first place and part of why we're in it still...and increasingly "in" with larger roles as adult leaders. This "Fun with a Purpose" is work for leaders and work for scouts, as they grow from boys into not just men but the men we wish them to become. No one in K is ready for the responsibilities that an older Cub can shoulder, let alone that of teens. Same can be said for the activities, but it's not hard to include the littlest ones.
Before we had the Lions pilot, we created our own K scouts group - we had to name it "Seekers" and couldn't call it Cub Scouts, but it was adapted from the Learning for Life BSA program and we carefully chose how it would be run and how the two groups would come together. Between our two packs in town, our leaders and some really strong scouts all came from Seekers. Starting in 1st grade hurts our program as the boys are too involved with sports and other activities by then - starting in K when many families are new to the various programs and activities means that we can more easily show them the value of participating in Scouts.
And, part of that value, as we see it, comes from the younger boys following the lead of the older Cubs and that the older Cubs can have the early experience of leadership and being such a role model. During Webelos & AOL years, our boys lead a pack meeting where they show the others (including younger siblings and sisters) knots, lashings, first aid, etc. That they know - and can teach - these skills is something the parents understand that they can't get from travel soccer and piano lessons. (We're so lucky that our Webelos get the skills from Boy Scout leaders and Scouts during many practices over the fall and winter months!!)
Our Lions seem to have a good Pack experience - from the PWD to the service projects and our overnight in the park! Count us in as FOR the Lions program...even though it may need to evolve over time.