On the streetscape/roundabout issue I dont see much of an impact beyond annoyance factor to locals. I think its a micro force and the macro forces are just too pwoerful in the area and ready for yet another leg up. Once the pandemic passes the completely re-done Hyatt formerly Four Seasons and La Costa Resort are gonna be a huge draw with access to a greatly improved beach area. The Alila marea opens soon and it is gonna have a massive impact on the area IMO. The Seabluffe folks who complained about it being built because they didnt want the vacation rental competition or traffic are gonna be huge beneficiaries. A room there starts at $4000 a week while a 2 or 3BR non view property in Seabluffe goes for $3K a week. Once you fall in love with the area why would you not prefer a private large home right next door. Prices should soar in there for rentals and sales.
I beleive that new resort will attract billionaires, pro athletes, celebrities and the very wealthy families looking for a true oceanfront beach resort in SD. While I have mixed personal feelings about it overtaking the pristine location, I am confident its gonna be a bonanza bringing a lot of focus to this area among the very very wealthy not just in the US but abroad. It will be our version of the Laguna Montage with a world class restarant in the works.
While there will always be bumps in the road over time I see nothing but boom times for property owners down there with spillover out to me as well. Hope thats what you like:)