Apples > Oranges, unless you want O.J. with your bacon and eggs. (Although I don't enjoy bacon. Waffles > Bacon.)
I'm not getting the error you are, but I don't use Lightheaded for the waypoints, and I never noticed that the option was available. As far as quests + map + waypoints go, Cart_QuestObjectives works so well that I never looked for that directly in Lightheaded. I do enter locations in Lightheaded into waypoints "on the fly" using Cart's Waypoint module.
I didn't like all of the little windows and seeing the same item in 3 windows.
If you're referring to Baggins, then for whatever it's worth to you, you don't have to configure it to be lots of little windows if you don't want that way. You also don't need to see items in more than one window at a time (if you choose to have more than one) if you don't want to. I have mine to be a few large-ish bags with sub-sections, and I use Baggins for the missus to set up her many bag layout the way she likes it. I am not so savvy with the others that I can find the same flexibility.
And the other options are just as good - successful inventory management begins with knowing what works for you, I think, and then finding it. For me, Baggins was a huge boon because Advanced Bags Plus was slowly dying without support. Nothing is better than whatever works for you.
I have a mental image of you strung up between two posts (of a split rail fence), head lolling to one side as you snore fitfully. Although the "you" part is very fuzzy since I have no idea what you look like, natcherly.
By the way, the imaginary you is quite tall and lanky. Probably because I assume you don't eat often enough, either.
I still half-expect rescanning my directory to clear the missing folders from my WUU list, or maybe just highlight the entries that are missing. But I've become accustomed to using it as a file manager, too.