>>51517531In VGC it's like 50/50 if Landorus is going to be a physical attacker or a special attacker. Not having to worry about Intimidate and making people uncertain if they can tank the hit from Landrus or if their support mon should be putting up Reflect or Light Screen are all huge positives for considering a special set over a physical set using the better attack stat.
>>51517789There is no real reason to use Mega Garchomp over Regular Garchomp, so doing some weird gimmick strategy with Mega Garchomp that takes advantage of the increases to its special attack at least gives you a reason to use one over the other.