I very much see the sense in the Phuket sandbox as a pilot scheme. Test, optimise, expand. If the clowns in charge of the show are capable of doing that.
I've also taken the view that Thailand ought to resolve at least the current covid wave before the peak season, when I would like to take a holiday.
However, at the moment performance is not very impressive, with half hearted lockdown measures, resulting in cases continuing to rise every day and a very slow vaccine procurement programme. So my confidence is decreasing slightly at present.