There have been a number of people saying that legendaries don’t have quite the punch they used to. Now that every troop can get to level 20, the difference between max-level commons and max-level legendaries isn’t as extreme as it used to be.
What would happen if troops also got a bump to magic when they went beyond level 15? Say that legendary troops got +5 magic, epics got +4 (skipping the bonus at level 16), ultra-rares +3 (skipping levels 16 and 17), …, and commons a measly +1 once you finally got them to level 20.
Would this be enough to make legendary troops scary again? What other effects would this have on team building and the meta-game?