Took me a minute to figure out what "potency" meant as well, but I did notice that my higher potency spells did more damage than my lower ones. Trial and error gave me my definition. /shrug
I do think the LB thing does need to be explained way better in the game since the tooltip basically just says "Does your role's team resource skill" and not exactly how effective that skill is or how it changes based on charge. But like where else would you put it, because it is a general command?? I have mine on one of my universal hotbars and I hate to have to write a macro for every single job change so that I could replace it with a job/role-specific lb.
(y'all my comment was solely on why people don't understand how to AoE properly, not "this game ar 100% transparent ppl is dum" so like this quoting me and then changing the subject is getting hella annoying.)
And to both quoted... er quotes, honestly I think this will come down to SE probably needing to have two types of tutorials (that a player can hopefully opt out of both when they've made alts). One being an "I'm new to XIV" tutorial and one being "I'm new to MMOs" With the "new to XIV" being similar to what we have here with the hall of the novice (but enhanced with the how-to-aoe, what-is-limitbreak, and other similar additions), while the "new to MMOs" REALLY holds your hand and shows you, like literally dims out your screen and points with flashing arrows and outlines how to walk, how to jump, what sprint is, how to interact with objects (and using the x button if they're using kb&m), how to parse tooltips, how to navigate each menu and window, how the chat box works, how equipment and stats work. Something more intrusive than "what's this green circle, get it out of the way." *clicks X on the pop up window* 'cause I think that's really the only way to get people's attention (It seems to work in other games that use it). It could probably take place in like that aetherial sea before your first cutscene.
(Though, I'd like to see a third tutorial like a "Hall of the Hero" at level 50 that shows you more advanced mechanics of your role, like tank swapping, how to avoid overheal, when to use addle/feint, how to deal with knockbacks, prey markers, earthshakers, proximity damage, and other various mechanics.)