its true that his aerial game is bad, and there is more emphasis on the ground game, but his air game can be utilized. what if i told you a short hop front air has enough knockback to enable tech chases around 80% as well as strings with his down-tilt at mid percents? or nair can be used as a gimping tool and get out of certain strings, aerial or ground depending. or dair spikes at over 100% (and is your jab reset/jab lock, depending on whether you come from brawl or melee.) even uair can be used to bait airdodges so you can punish. empty jumps can be used to bait as well. and his side-b in air does 14%, and you can combo it with down-tilt even at high percents. up-b is a solid kill move, even when used in the air, and nair can string with it in the air. most little mac players don't use his air game at all, but a better little mac is one who takes advantage of his amazing ground game, and fully utilizes his aerial game, even if its not as varied or solid as other characters. there is more to mac than a solid ground game and crappy air game, most people just don't know it.
i think i already mentioned it in my previous post, but yeah, lucario is harder in general, i just found it easier when i was using little mac cause i could kill him at 50-70%, since his neutral game is not great and ending lag on his moves sucked, so its easy to punish. little mac can kill with up-b or side-b in the air, but those are his only kill moves. edge camping against little mac actually is a tactic i prefer my opponents to use, i take control of center stage, i can approach how i want, and i can pressure with my low cooldown moves, like my down tilt, jab, f-tilt, pivot smashes, or roll cancel grabbing. it works on most little macs because they think a smash, or dash attack (dear god) or side b will work. btw, macs should NEVER use dash in neutral, but that's a different topic i won't talk about till later. point is, most macs don't use tilts, or know how fast it really is (d-tilt comes out frame 3, f-tilt frame 4, jab frame 1, and so on.) hard to punish moves like that, or shield on reaction to them. custom makes him much better too, side b gaurd breaker has super armor so it can't be interrupted easily, neutral b flaming lunge can be a recovery move as well.
my only complaint? the k.o. punch mechanic, which gives you more for taking damage than doing damage, which rewards bad play, if it were the other way around it would be better.
my NNID is jet942 i believe. i would love to play a solid lucario, since most just abuse aura, and for some reason, don't use his aerials. i also have secondaries in roy and ike, and can also play sonic, falcon, and kirby well (my pocket characters.)