Blizzard Entertainment's RTS Community Manager released a new batch of questions and answers replied by the Starcraft II Team. In this week's Q&A the developers talk about the usefulness of Tier 1 units at end-game tier. New units will be added to Starcraft II to replace the reaver and soul hunter -- which got axed on August. It could still be possible for older units to make a come back. The firebat, for example, has been added to the latest build of Starcraft II and it is undergoing testing. The developers also comment on the reasons to remove lockdown and mind control.