I find these encounter to be rather fun, and would love to see lots more of them. However, I doubt they will be made more profitable simply because they do not consume a leve allowance. I was testing the lvl 25 one with the goblins just a bit ago on my off class. It's fast, fun, profitable already AND can be repeated as many times as you want.

Each run with my lvl 28 was netting me about 150 gil AFTER repairs, and only took roughly 5 minutes to finish. Sadly, they apparently stop at lvl 40 after an 8 man version. Here's hoping they add more! It would be very nice to have a lvl 50 4-man boss fight that was profitable, even if it was only a few hundred gil per run.