When will RM-975_1043 receive Update 2?

[IWO]

I'm currently using a debranded&flashed go phone (ROM is RM-975_1043 US Country Variant)
I'd like to know whether the ROM I'm using will receive Update 2 in the near future.
If not, would you suggest me a ROM that receives updates faster & is unbranded?
And I find it odd that the AT&T post-paid phone is receiving Update 2 faster than and unbranded ROM