12/9 > 1/9 = 1 month.
12/9 > 2/9 = 2 months.
12/9 > 3/9 = 3 months.
12/9 > 4/9 = 4 months.
Even in the most vague case it hasn't been even 4 months yet.
Also, we are stretching the concept of "small mathematical errors". Yeah, it was 50% wrong, but who cares about the details.
Further, we have yet received the updates for the March period due to the delay. There is a lot shit going on but we won't see it before they implement it. Lastly, the larger the change, the longer it takes to implement. Rehaul? We're talking about 3-4 months of work here. Changing mob sizes? Maybe few weeks of work. Small updates that take less time to implement are coming sooner than rehauls that take longer to implement. It's not rocket science, but then again, neither is counting the months...
How do you know this is not exactly the kind of stuff they worked on during that time? It seems this particular update is ready for the next patch, yet they only announced it today. Thus it is not unreasonable to assume they haven't worked on it that long, maybe few weeks at most.As far as the disaster goes for all we know development did not totally stop as Tokyo only got rolling blackouts which is where SE is.