She's not underrated, she just has her crowd and kinda niche genre with not a lot of crossover. Put her headlining WHs and you'll see the difference. Not within and around the legend slot/nastolgia other stage slot where it's a one time only for some.
I reckon they would still announce it but one big factor would be the 6.5 hours travel to get there. Even the Liverpool lot are shaving over hours plus off that.