Definately a great move
I just hope devs somehow find a way to allow account transfers to these dedicated servers, having already spent an enormous amount of money I don’t fancy spending thousands more.
But transfering to a new server pretty much invalidates the new server status as you would be like a 30+ castle playing against others still getting to 10, unless it had certain restrictions in place as respecting the highest castle/power level in there. It would still be annoying if a power whale existed there way ahead of others and unlocking early transfers for suddenly a bunch of other players transfering into it and matching the power whale's level.
As for money spent I do kind of agree you should be able to somehow move the money you invest in a server to another one, even if it's just like half of it. I spent like $300 in 2 months to stay competitive even as the game reached that disgusting state of Art of Dwarf Jacques, no way in hell I am doing that again for a mobile game.