I'm being rewarded less for spacing and being punished less hard for mindlessly hitting your shield point blank. This is clearly a buff for mid-level players, but people who learned how to play around OoS options got their options weakened slightly. While I dislike that what I put work into is nerfed, I think Shaya's right in that the shield stun/shield lock change is possibly genius design; the skill floor for being offensive in Smash 4 has been lowered and top tiers got nerfed slightly. The gap between OoS options and natural shield drop options has decreased, which is something most top tiers had (SH FAir for Sheik, Boost kick for ZSS... although she has godly natural shield drop options) and something low tiers didn't (heavies minus Bowser). I want to say that the Smash 4 team wanted the game to develop around conservation of shield lock frames, but it never did because very few people really understood the mechanic. So they said, "nope" and made it a little bit more consistent so that the metagame can develop around "X is -5 on shield drop and is always -3 on shield" instead of "X is between -7 and +0 on shield drop depending on shield lock frames." The hitlag change is very significant and is consistent with making moves consistent (hitlag on shield matches hitlag on hit), but this makes electric attacks (Pikachu) and high hitlag modifiers
so much safer than they used to be and low hitlag modifiers
so much less safe. Consistency makes things easier to lab, which is why you see new people trying to lab "Oh, this is -3 on shield. If I use my f4 jab, it beats anyone who has worse than a f7 OoS option."
The take away is that there's a lot going on in this patch that balance each other out and Smash 4 is
different for sure. I think the game will develop
faster, but whether it's better or worse... whatever. Just play the game.