The flash issue has to do with poorly optimized encoding of the video, leading to the need for excess processor time to decode, which leads to what you see in Activity Monitor. Updates to the DEcoder, i.e. flash player, will have no effect on the ENcoding. Your analogy is poor.
That said, and back to the OP, the heat issue lies at the processor level, so without a swap there is nothing that can be done. However, Coolbook has demonstrated that if Apple were to release a fix which changed the voltage profile, the thermal problems would likely no longer exists for many users.