Hmmm things I would've done differently. Let see, I would have sprung for a better tank instead of one that was lying around in the backyard. Because it was old it has build up on the glass that I just couldn't remove and now its an eye sore and bothers me every time I look into the tank. It also makes it difficult to take any decent pictures through the filmy glass.
I would also probably pick a bigger size tank (maybe 120 gal?) because even though the sundews are perfect for it, the pings seem to be almost too big for this size and I'd like to add more pings since they're so easy to grow in the tank. But that would be something of a luxury to have a tank that size
I would also sterilize all the rocks before putting it in the tank. The ferns that are growing in there are a constant chore to weed. I think this would have been prevented if I just sterilized before hand.
The last thing I would change is I probably wouldn't have added the U. praelonga. I can see now that it'll be an issue eventually. If it was a different utricularia with smaller leaves I don't think it would be such an issue, but because these leaves are so big I think eventually it'll over grow the sundews.
But all in all I think everything is working really well, these are only minor things really