Audio Mastering app already supports new Audiobus with "State Saving" feature and works fine under latest iOS8 beta with Audiobus.
AltiSpace app will be submitted for review on App Store this week. Besides compatibility with new iOS 8 and Audiobus ("State Saving" supported) this application will have several significant improvements such as smaller pre-delay time than now and larger total length of IR sample. Also it has additional feature of changing the start time of sample (offset from beginning of sample) and several new audio control options.
Master Record and Master FX apps will be updated after that.