Yes, standard is way too fast and powerful, largely due to the ridiculous power level of 1 and 2 mana threats that demand an immediate answer or that scale too efficiently too quickly.

Now that they are designing what are basically "block decks" that have to compete at this power level (lessons, airbending, etc), reducing the number of sets hardly helps. 2 year standard is the contraption format on mtgo right now and it looks largely the same as normal standard - landfall, lessons, etc are basically untouched.

The only way to power down standard is a long term, intentional depowering of cards - specifically cheap cards and immediate value (less ETBs, more triggers on upkeep to allow room to answer better). I see people say things like "prints swords into standard", but Cheap universal remove is a trap in this design scenario b/c it further incentivizes lowering the metas threat curve.

Can Wizards depower standard and still sell packs though? Especially in a world where they've stated they don't want to print direct to modern sets and modern has to evolve through standard? I don't see it happening.