With the new update comes a little change when leveling up your champs:

Let's be honest here, we need to disable or move the unit level up option somewhere else.
It's on the same level as those units pop up offers, I can already see people making posts about pushing that button inadvertently.
I know a similar option option already existed for rank up but it didn't feel misplaced like this one does. Plus what's wrong with the cost ??