Nu~
: My main problem with Brawl is its stale move mechanics. Not only did stale moves weaken the amount of damage an attack dealt, but its KBG also suffered, which meant that attacks that could easily KO as early as 150% damage when fresh would end up struggling to KO well after 300% damage when stale.
The stale move mechanics in Smash 3DS / Wii U are far less harsh, as the only penalty for using the same attack repeatedly is a decrease in the damage dealt; KBG doesn't get affected, so even when stale, the attack could still be reliable at making KOs.