replant in a pot with large drainiage holes and a slightly poorer quality of soil(new soil) so it remians quite dry.

I think it will probably pick up of its own accord. It's possible that as it's still a young plant and not very strong yet the rain has simply battered the leaves into submission. They are still a good bright colour and will probably perk up in a little while. Don't do anything unless it starts to looks worse.