The boot times / shutdown times are helped along by the Intel HD4600 accelerator. Since the AMD card has to be set more as a secondary card, it is not able to lend its accelerator to that process. The sleep issue has been a proverbial thorn in the side for some time now in the Clover world. [By the way, the current work to get the IGPU booting problem solved is also working on that one. Some systems are able to have it others are not. ??? That is mine. In Clover, I have the option dart=0 set, others need the darkwake option set. Others do not get any choice. ??? BTW, macOS Sierra 10.12.2 Public Beta Five (16C60b) is available. The relevant AMD 9500 Controller and 4100 kext have been updated to version 1.48.15, but audio is still horrifically bad.