Oh no. I don't like change. Who does? It really is a New Era. 
Whoah!! This is why I'm eery about titles, for me a New Era doesn't really work as a name because it's not like they used that name when Lynn and Alex first replaced Meav and Orla which to me SFTH was like a new era I suppose or not!
Michael Jackson Tour called "This is It" 
So perhaps a New Era really is unknown in how different lineup and who is part! 
I think A New Era is referring to them continuing on after the 20th anniversary. The term “era” has become more popular after Taylor Swift’s Eras Tour, so maybe they’re trying to capitalise off that as well. Remember when everyone was all “I’m in my __ era”?
Huh, that's ironic that Taylor New Era... you could be right.
Actually yeah, it's the next chapter passing the 20th Anniversary and since the news of the musical director would need to change which I'm not saying is great news because prayers to him, but it's interesting that Gavin Murphey era started right after the 10th Anniversary and is it the director of Postcards From Ireland started after the 15th Anniversary Celebration Tour
New Director after 10th Anniversary
New Director after 15th Anniversary Celebration
New Director upon 20th Anniversary
New Director after 20th Anniversary Yet Another Era indeed!

Just look at it the sequence is very organized!