As usual in such tracker bugs, please no talking. If you find a package not compiling against >=hunspell-1.5.0 please file a new bug and make it block this one.
commit 3cf4405d2f0af8584d4548bc7d483255b591e45f Author: Lars Wendler <polynomial-c@gentoo.org> Date: Mon Nov 28 14:27:57 2016 package.mask: Removed hunspell mask. Let's see what else breaks...
You can maybe mail Toralf for running a stable tinderbox and fix/stabilize needed reverse deps... that will help to even stabilize this sooner when it is needed ;)
No more regressions being reported.