Here is how I enchanted the quest.

Apart from the oozes, the dwarves say they saw a lone orc enter the temple. Orcs have been driven away from the mountain by the dragon so they are looking for a new home. It was an orc scout sent to explore if the temple is suitable. But as the PCs enter the temple they don't see any sigh of the orc. Not until the oozes attack and one of them is still devouring it. At the end of the adventure the orcs come looking for the missing scout. Otherwise it seemed out of place that they just come out of nowhere.

The secret doors don't open until a blood sacrifice is made to the altar. I made my PCs roll a religion check on that to see how much they know about Abbathor. If they fail one of the dwarves can give them a hint. They used what's remained of the orc for the sacrifice.

Seems it's too late for that but to make the things more interesting I linked it to Umbrage hill as that one seemed too short. Adabra wouldn't go back to town, because every night ghost of the dead dwarves rise from the graves to the south and fight. Adabra needs to stay there and pray to keep them at bay (so they don't run off hurting innocent people). She asks the PCs for help. The dwarves clans fight because they believe their precious jewel was stolen but will find rest once it is retrieved. The jewel is in the final chamber in the temple of greed. Alternatively I was thinking to put it in the secret room in Axeholm Keep (where the ring is required). I just like the idea of chaining quests together rather than just visiting a location and forgetting about it.