If we would openly make suggestions to LoD, it would be this. Based on < one > simple logic behind it.
Always going for efficent builds becomes redundant and repetetive, and playing against 4 easily chained disables gets lame very quick and way to over-countered by bkb. Making it as onesided as possible in either case of who has the upper hand. Those are the games that are the most forgettable ones.
If you were forced to some degree to compensate some efficency for creativity (Because let's face it. Stuns are the best, optimal and easiet solution to any draft decisions). with creativity the LoD gaming will nourish from having more intresting games in the long run.
For the very same reasons you may not pick 4 passive skills. I believe this should apply both ways.