Well, he's disassembling the Kickstart now and doing a decent job of it. It'll probably take more than a week though. If he doesn't know 68k Assembly then why is he so adept at modifying and identifying shortcomings in the 68k code generator for GCC? Maybe he hasn't coded entire programs in Assembly because he wrote them in C and optimized the slow parts in Assembly like any sane programmer would.
I think Thomas Hirsch is probably behind the hardware stuff and Gunnar is doing the software part as he goes. As for the Kickstart needing to be patched for the Coldfire, it doesn't need it any more because the latest Coldfires are only available for bulk distribution. The 68070 makes more sense anyway in that regard.