I'm bored. I've seen all the shadow lairs... Guess I could squeeze some more fun out of those levels, but that's just to expensive if you're not interested in the "premium rewards" but just in actually playing the game. Especially not worth it, if you want to try something fun/stupid that could easily result in a very early wipe. Pay 5$ just to find out how far I'd get in ufsc with chaos set, sudaruska and BaB? Might be a very short adventure. Also: Fsc seems even more boring now after we did ufsc.

That's why I suggest: let us actually really play those new levels!

Example Solution:
Let players that have the artefacts (echo stones) from a real shadow lair access the corresponding "shadow lair light version" freely from the echo stone context menu or something like that. Take away the sanctuary-mats and some of the extra red boxes + stuff, the rest should be balanced enough => yay, lots of hours of "new" gameplay!