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tl;dr The patch team have bigger issues to deal with than old bulletins, unfortunately.
I do not agree with that.
If the MOD team has bigger issues to deal with it because with each patch the create new issues (see super heavy meta).
A single patch that fix a large number of issues a like vet bonuses, vet abilities, xp values, reinforcement speed and times, reinforcement cost and simple thing like bulletins would be far more useful than a patch that simply nerfs an op unit to oblivion and buff a obscure unit to OP level.