Dine Out needs a major patch, not a "refresh." To me, refresh suggests updating and adding elements so that the pack will be on par current production offerings and play nicely with the existing gameplay. Spa Day is pretty great on its own, but Outdoor Retreat is, IMO, really weak. I only got it after owning Seasons, and I could not understand why everyone liked it so much when trying to find all the plants was such a pain. I made the mistake of sending my first sims there for Winterfest, which was such a bust.
With Cottage Living's focus on farming, it would make more sense to update Outdoor Retreat to integrate better with current gardening systems. It would also be much easier to add in hiking like from Snowy Escape; if they attached it to an catalog item like a tip board or the info booth in Granite Falls it shouldn't interfere with the existing world.