if from my point of view:

Best Decision: cross platform support me and a few of my friends would never had played ffxiv if they hadn't have done this

Worst Decision: Alexander Gordias this raid was a complete mess the story was uninteresting, the normal loot system was absurdly rng with no way to mitigate (this loot system was originally just 2 random items would drop out of 3 possible items and you could have duplicates in the loot table so plenty of 2 cranks when you wanted spring or shaft etc it did eventually get changed due to player demand thankfully) Savage destroyed raiding scene and was gear gated so no matter what you couldn't finish it no matter your skill level until at least 4 weeks had passed