Talk:List of champions/@comment-31975806-20170510225132/@comment-28977071-20170512085729

You still can:

Damage type affinity is provided on subpage linked in the very first thread reply by Emptylord. Tank and controller classes are still present on this page, only formatted as icons. Which are imo more intuitive, especially because they've been a well-known class identifier for years.

You could never:

As for identifying the healer, I'm afraid that you've mistaken the constitution of a champ (aka their pool) for their healing potential. The green column labeled with the 'shield' icon is the one. I believe that there never was any official attribute for the estimation of a champ's healing potential..