I believe some of those issues will be resolved with the pending move of a lot of
haskell.org infrastructure to a better dedicated box that gershom and others have started undertaking. Not sure what the precise timeline is, but they're actually working on spending volunteer time making it so, and it will be quite I believe.
migrating all the tickets and such would be a pretty colossal undertaking, and the ROI of that vs just getting the dedicated hosting upgraded doesn't seem to be there, and would take longer.
I might be missing some pointed, but all the trac stuff and friends will be getting a nice update soon once the hosting infrastructure is updated. (the ghc trac is hosted with the other
haskell.org software right?)