Non-parallel version of GC

Hello all, How would people feel about an alternate GC implementation in GHC which is not parallel? A GC like this would be simpler to understand, maybe a little faster when parallel collection is not being used, and (most importantly for my case) easier to extend with interesting features. In particular, this implementation would not have gen_workspace or gc_thread; these would either be unnecessary or folded directly into the actual generation object. Thanks, Edward