I think this is for the best! This extra year gives her a proper runway to develop the show, promote properly, and finish the album in a non pressure cooker environment. Any artist that had the same show / location running for 5 years would experience a lack of ticket demand, so this should help restore the natural demand for Britney!! Kinda nice they started prepping the show, because it will give her time to organically add her own Britney elements to the show theme (if it stays the same... which I assume it will due to $$ costs). Happy she gets to relax and be there with her family!! Girl deserves some TLC for sure.