Also people one of the reasons why they had trouble with 4.1 was stuff like the concert they recently had, among other things, and apparently yoshi-p tried to push the concert back but nope, so the dev team pushed out what they could for the 10th of the 10th or you would of had the patch pushed back a month or two with eureka being added, which would of made people complain more because they had to push back the patch.

TLDR: To small a team, not enough time.