Well, many times when you join a party you enter the Clockwork and the team you joined has just finished that level. Meaning you spent 10 energy and a small amount of Crowns, and get nothing in return for what you just spent.

How can that be avoided?
-Yes I know, you could just message the person and ask if they are almost finishing and whatever. But many times people aren't able to answer due to being busy fighting stuff.

I suggest that there could be provided more information on the current status of the level.
For example when you hover over someone in your friend list, you can see the amount of people in his party, something similar could show the % of completion of the level he is currently in.

A % of completion does not even have to be very accurate, it could just help us know if they are more than halfway done or in the beginning. Giving us the choice of waiting for them to reach the next level so we can join in the beginning.

Another thing. When attempting to enter another random party through the arcade also has this problem. If there was a party list, with the available slots and level completion %, that would help everyone.

The level completion % could be calculated by the total amount of monsters killed, I think each level has a fixed amount, so that could be done.
Or by the amount of gates opened.

Thanks.