Lets be fair, there currently is no real hard content in the game. With a 5* comming out every 2 weeks there is no need to have Edelweiss now. My Edelweiss could use some more battle skills and inventory, I started like 5 days before the completion of the event, barely knowing the importance of medals, but I'll wait. In 4 weeks you'll forget all about Edelweiss too.

As rupturezz said, actual content is easily achievable (dont know if i spelled that right) with a full team of evolved 4* girls, and thats kinda easy actually with some gacha rolls, even thou i want edelweiss too, i dont like the idea to rush things like putting edelweiss right away just because we missed it, what i would really want is like catch up mechanics, or make nutaku a bit more fast-paced in terms of events and things like that, otherwise we will like never catch the dmm version, like with blade&soul, patches are released really fast to catch the korean version some day, nutaku should do the same with this game, however this shouldnt be like super fast, just not 2 weeks events, a lot of people, and like really a lot, get 3* on all stages of an event the first couple of hours is out, so i believe nutaku can make things a little faster and it shouldt hurt anyone.

In a year, people will say: "What? Edelweiss AGAIN? We already have her, c'mon Nutaku!"
So, I don't really see the point to bringing her back ahead of schedule.