They had a a grip of time after finding out about Red Skull taking Xavier's brain to get a telepath on that team. There is no legit reason why they didn't recruit one.
Dude, I AGREE with you they SHOULD HAVE done that, but that has been a constant oversight Cap has made in building teams. They still don't even have one in Hickman's Avengers and that team was custom selected by Cap. This is a long running theme with him. And what Telepaths would the even be able to select, Rachel Summers and Psylocke both have more aligence to Cyclops and have both said fukk the Avengers, Cable is currently an enemy of the Avengers and Frost is not 100% at the moment and anyone lesser is not field ready. WHO would they have picked?
Also, right after the Red Skull thing, they had to deal with the Apocalypse Twins and that was a bigger threat than Skull was at the time. What you are saying makes logical sense, but its just not practical at the time.