Not being able to triple stack bulletins make most virtually usless. Because anyone would ever notice pioneers being 2% harder to hit...
+1
Triple stacking bulletins is the only thing that motivates me to collect them. I couldn´t care less for a 3% movement speed boost to Stormtroopers. A 10% speed boost however is actually noticeable especially when coupled with the faster retreat speed.
I´m not going to actively pursue three different kinds of bulletins that do nothing noticeable and buff a unit "here and there". There would be no main focus I could concentrate on.
This has to go with a change to the performance boost bulletins give you. And then everyone has a super effective bulletin, which eventually means nobody has.