I haven't watched any of those videos yet, but going by the portraits Petra's redesign looks amazing. The head accessory really adds a lot.
For me it really depends on how well it's paced on repeat playthroughs. Three Houses' monastery made repeat playthroughs a chore, so even though I did replay the game (which is a rarity for me) on the Golden Deer route, I still haven't gotten to either of Edelgard's routes. Hopefully this being an action-oriented game replays will be a lot smoother, but since it's also bringing back the monastery system, well....who knowsI'll choose all three or 4, or 5. However many routes there are lol