I couldn't find if this has already been proposed here or not but it would help if we can remove the buff currently applied to the barracks. The reason for this is the that Barracks are a key building linked to adventuring, and adventuring takes time. Having the right ammount of troops at the right time is essential for adventuring, especially for Fairytale avdentures, where a massive load of troops gets wasted. This is where the Barracks' buffs kick in. Since there is a variety of buffs players can use (x2, x3 and x4 accelerators), imagine how a player would feel being left with his/her hands tied for a good 12 hours period for sticking in the wrong buff onto the Barracks (my case exactly).
So developpers, please consider this: removing the barracks buff and allowing players to apply a new one, won't affect your sales. The player will simply lose the current buff, but will grant him felxibility when needed. Hope all this makes sense. Thanks for your attention.