I had the exact same experience as OP, and I really disliked it.
Important area should never be only available if all your characters have the good spells/features/items or through teleport runes.
A locked gate with a lever inside to open it would be better. This way you could explore with a character that has special abilities and that would open the path to the others rather than having to "exploit" the convenient runes.
Last edited by Maximuuus; 23/11/21 09:58 PM.