Right now, ur'Traps are still pretty frustrating to use; you place one down, and after x amount of hours (depending on ur'trap upgrade), it may catch one creature... or it may fail. Either way, you have to go to the trap to reset it and allow it to catch another creature.
This means, to really use an ur'trap, you have to schedule your time around it (remember it, give yourself a timer for when the time will be up, etc); it is one of the more aggravating artifacts to use, in my opinion because you have to continually go back and reset the thing on a rather lengthy time scale. I'm not sure why it needs to be this way. I believe that there exist options to make it more user-friendly.
My idea is to, instead of making it a "one-shot" trap, make it more like a trap akin to RL lobster traps (which are designed around catching more than one creature at a time).
1) Make it so that the trap is permanently placed, as long as it has bait-- once it runs out of bait, then it can do what it currently does.
2) The ur'Trap can hold up to x creatures (I would say up to 5 creatures, but you could make it start at 3 or something and give upgrades that take it to a higher amount, such as up to 10 at the highest level).
3) One creature will be caught at the current trap rate (so at level 1, it will catch 1 every 20 hours, at the highest level it will catch 1 every 4 hours).
4) Increase how much bait can be put into the trap at a time (I'd say up to 50 pieces of bait).
This set of changes would enable us to go tend our ur'Traps on our own schedule, while not really increasing the maximum number of captures that we are able to do. We're no longer stuck scheduling ourselves around when our trap will be coming up for renewal.@Estarra
: This would definitely make ur'Traps a more appealing purchase, to me. I know others have been complaining about them off-and-on over the years since their implementation, as well, and I think this does address the biggest remaining issue with the things (now that you've already tried to address the reward-side of the equation).