Here is the second update with three weeks to go until alpha:

#23861 - 
<https://code.djangoproject.com/ticket/23861> Fields referenced in 
migrations cannot be (re)moved, even if migrations have been squashed 
<https://code.djangoproject.com/ticket/23861>
#23891 <https://code.djangoproject.com/ticket/23891> - Revise deprecation / 
removal timeline for IPAddressField 
<https://code.djangoproject.com/ticket/23891>
Owner: ?
This week: On ticket #23891 I proposed the idea of moving model field 
deprecation warnings to the system check framework. I am waiting for 
feedback on this approach before investing further.
Last week's status: We need someone to investigate a strategy for how we 
can deprecate model fields while keeping them available in historical 
migrations. Any takers? If we cannot complete this, I propose we bump the 
deprecation of IPAddressField until the issue is solved.

#22340 -  
<https://code.djangoproject.com/ticket/22340> Legacy Table Creation Methods 
Not Properly Deprecated <https://code.djangoproject.com/ticket/22340>
Owner: ?
This week: I think the performance concerns are no longer a blocker to 
resolving this ticket (see the mailing list thread for details). I did 
research on the remaining work needed and left a comment on the ticket. I 
will work on the implementation next week if no one else picks it up.
Last week's status: This issue is being discussed in the thread "Migrations 
in Django 1.7 make unit testing models harder". In short, we likely to need 
to solve the performance issues with migrations before we can proceed with 
the deprecation. If we cannot, we'll likely have to delay the deprecation.

#23271 - <https://code.djangoproject.com/ticket/23271>Makemessages can 
corrupt existing .po files on Windows 
<https://code.djangoproject.com/ticket/23271>
Owner: Ramiro
This week: no update
Last week's status: Ramiro said he would have some time to investigate the 
issue soon.

#23745 - Migrations migrate is slow 
<https://code.djangoproject.com/ticket/23745> (new)
Owner: Claude
Status: Patch seems to need improvement so it doesn't cause a regression 
with swappable models.

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