It would be convenient to see potential stats of a hero at a given ascension level.
Common heroes that are available in everyday portals can be viewed in maxed state. However, there are HOtM, event heroes and Atlantis heroes that are not so easy to check.
When we decide what hero to ascend next we need to see its stats and not only for a fully ascended heroes, but partially ascended too. Like 4* hero at 3.60 or 5* at 4.70 or 2.60. So, it seems helpful to have a preview mode that has a slider that increases/decreases hero’s experience and shows correspondent stats. To simplify the implementation it can show only final stages of each level (1.50, 2.60, 3.70, 4.80).