Ohh they deserve sympathy. They bought something that got changed. It was wrong. It doesn’t make it any less necessary. But it is not their fault and they suffered for it.
As for mythics hitting a tier up. I STRONGLY disagree. By that logic ronin will have no counterplay until not just the next tier of towers but the set of towers after. A maxed mythic ronin will have the raw numbers advantage for months and months over the max possible towers. That breaks balance. That creates situations where defenders are at a substantial disadvantage due to simple stats and there is literally nothing they can do to counter that. A dragon should never be released when an appropriate tower level is not available.
Otherwise this is the surt situation with raw stats. Surts stats were so much higher than the towers there was no counterplay. If any other dragons stats are higher… well. We have been there before. So unless mythics are going to have garbage spells to balance their 1upness, it can’t really be allowed