If you look at a map of 30A (and I'm sure you have), it's obvious that there is a long way between 395 and S. Watersound Pkwy. with no outlet to 98.To put it in plumbing terms:
I don't care what kind of pretty pipe you put in place, you can still only get so much water through it. Seagrove needs another pipe.
A new outlet would be nice for my convenience, but the undeveloped land in state parks are so precious here. What would be the environmental impact of putting a road through a state park? These parks are the habitat for many species of animals. I think I'd rather wait at 30A/395. Or drive east to S. Watersound Pkwy. and hop on 98.
There are about 4 months out of the year when the traffic is a big problem. In other months, 30A east of 395 is like a ghost town.