I don’t like the idea of constant xp points popping up. A frequent used spawn point would get you pop ups all the time.
We also already have multiple ways to check if spawn point is still active.
On every spawn we could check if our rally point is still available
When playing engineer I just swap to building mode and check if the old one is still active. Just try to build a new spawn point, if there is another one active you get the message that former one will get destroyed
Just have a look ingame or look at the minimap if your teammates keep spawning at the rally point you placed