Do you think it makes sense to add gcc-4.5.4 back into oe-core, if it turns out that gcc-4.7.2 is causing a lot of issues for some targets?

I'm creating a gcc-4.5 recipe locally, modeling it after the current gcc-4.7 recipe folder. I've taken the patches from the gcc-4.5.1 recipe folder from a previous yocto release, and was wondering for the recent gcc-4.5.4 release, which of these patches can I drop?

I notice that around 60 to 70% of the above patches are still applied to the gcc-4.7 recipe, so I was wondering how one maintains this recipe.

Best regards,

Elvis Dowson