Ideally of course there'd be brand new dungeons added as the patches keep rolling in, but judging from the scarcity during Shadowlands, design resources for such aren't apparently in the mix. Therefore I'd much rather see re-introductions (given that the dungeon ultimately plays out well) of older content than having the same rotation for ages.
Mildly torn. I don't mind old dungeons but I feel they should be a one to one each season with new ones for mythic plus.
The current change feels like an excuse to be lazy with content.