Thankfully, this was the prototype of this new Raid system, the changelog for the next one (x-mas) from JP wiki:
十字架のドロップが自発のみに変更
魂ドロップについて。難易度Expertか 神破魂。Ragnarokから討魔魂のみに変 。(要検証)
難易度Ragnarokの救援参加人数が10名→2 0名へ増加。
イベントガチャからの功績ポイント 出削除。
I'm... a bit lost with some of these. Like the first one. 十字架 is the item you need to open Expert and Rag, though a different one for each. This doesn't specify at all which one it's referring to, so probably both. So what does "is now spontanious" mean? I assume that the mats for both Expert and Rag are now much, much more rare. So the whole "omg there's 100 empty Rags up flooding my Raid screen" should be gone.
The second one means that Expert is now only Blues, and Rag is only Reds, I believe. This is... kind of good, kind of bad. It was really good to get Reds from Expert at times, since Expert is so much cheaper than Rag. That's gone now. On the other hand, you now know what you'll get.
Rags are now 20 people max (save the little people!).
PP has been removed from Tickets (thank god!).
Overall, the next Raid event should be much more comfy. But it looks like the Ticket gain is still in the pits. Which is unfortunate. And you're really shoehorned into the 400 BP for Experts, 400 BP for Rags situation.