I feel like with the added Final Smash meter, final smashes in general were given an overall buff in the "easiness" of landing them, making each final smash a high chance of hitting and turning the favor completely over to the other opponent. However, I do think it is a little ridiculous. Some final smashes have a guaranteed combo, like Dark Pit (I believe, don't quote me on that haha). He can back throw into his Final Smash in all percents, I believe. Some Final Smashes do have crappy hit boxes, such as Sonic and Rosalina (in my opinion, while some are completely broken and unavoidable, such as Peach's final smash. Alpharad made a video in which he ranked all of the final smashes, and went through potential combos that can easily land into the character's final smashes, I suggest watching it to see how truly broken some final smashes are.
VENUS