Hero transfer and help tip in airship

Hi, the help tip info for hero transfer under airship seems to be the tip for rollback. This actually doesn’t explain anything about transfer. i used transfer on a mythic and to be honest this function just makes you lose hard earned hero’s over rollback. Rollback you get your heros back while Transfer cost addition hero’s to complete. Now later you might save on Jade and a few other items on genesis+ but that is at the cost of your hero’s. This is not explained or indicated in the tip provided within the game, as it’s the same tip as roll back it suggests you get the hero materials and 80% of upgrade items back.