The addition of increased shield stun will definitely impact the future of Smash 4. Whether this change leads to a more offensive or defensive meta remains to be seen. On one hand you have more shield stun, making attacks much safer on shields. This obviously encourages and rewards offensive play, right? Well, maybe not entirely so. On the other hand we have weaker shields, which may encourage competitive players to "play it safe." Zoning and running away would now be safer options than shielding, meaning cat and mouse matches could become the new standard. If the meta were to go this direction, characters such as Sheik would become even stronger. Safer fair shield pressure, more shield stun from needles, and the speed and mobility to escape dangerous situations would all benefit Sheik. The latter is just a worse case scenario, but at this point anything is possible. I'm really hoping for this change to speed up the game, Smash 4 could really benefit from more aggressive play.