Just a few things to mention on Lucina I haven't seen explicitly stated yet.
While some of Marth's tippers are now easier, Lucina's aerial damage is now higher than Marth's average. Prior to the 1.1.4 patch, most of Lucina's attacks did the average knockback growth and damage between Marth's tipper and sourspot. Marth needed to hit 50% of the tippers on his attacks to keep up in damage. This has changed for all aerials.
For example, before the patch Lucina's fair did 8.5 damage. This was the average of marth's sour spot (7) and tipper (10). Now her fair does 10.5 damage - not only is this more damage that Marth's tipper in the past, it's more than marths new fair sour/tipper average damage (8+11.5)/2 = 9.75.
She now has greater than average damage on all aerials, and greater damage than Marth's old tippers on fair, bair, and dair sweetspot.
This also allows her to pull off some things Marth has difficulty doing.
I checked
a random Match of Pugwest's Marth in winners finals just to get an idea of how often Marth's hit tippers comparatively. I went to the Sheik match, since the first match had 2 SDs. He hits 2/15 (13.3%) tippers on the first stock. Next stock was 2/13 (15.4%) tippers. SD's ignored, Pugwest also hit below 20% tippers in the first Bayonetta match.
In
another Winner's Quarters Match against a Lucario he hits 6/15 (40%) tippers on the first stock, and 12/31 (38.7%) tippers on the second.
Just some things to keep in mind while thinking about Lucina. It seems like most people are placing her based on what they believe of her in theory, not in practice.