If you go and try and get a house in riften you can't if you already wiped out cragslane cavern before you do the quest. So don't do that. Skyrims broken.

Perhaps a bit of a sweeping statement, no?

same thing happened to me with the windhelm house, I'm not really worried though, just more stuff to see for my next character

Seems to be the norm lately around here.

"Oh noez, I buyed Fabelz 3s for da Pleystasionz 3s cuz I thinkd it waz Skyrimz!! Skyrimz iz brokt itz Befsuftz faltz!!!"

No the 'disrupt the skooma trade' bug disallows being thane, you can still buy Honeyside and decorate it. (no housecarl)

This is accurate. and spoiler...

...if you side Imperials and finish the Civil War, Maven gives it to you with no thane quest progress required.