Your ios38 is as it should be. I suspect that the slowness is partially in your head, but you could install cios38-r17 to replace cio38-r14. These both install to ios249. If the GH5 worked in any loader, you cios is fine. You could try to update your usbloader gx, or install a different rev of hermes. Hermes is at r-5, but it may not be supported by all loaders yet, or your loader may be outdated. You could also try cios38-19, which has many options to provide support for GH5 type games.