how long is this going? im sick right now :(
since i play alot frontier i think some things are missing and could be (maybe) fun to have them.
first of all on low mana battles theres not much u can do and sometimes even just play like 1-2cards and when u have then only 1 or 2 different classes theres almost nothing u can play. it would be cool to have more low mana cards for all classes (of corse not op ones u can use far into modern mode) but at least some weak low mana cards so you have more options to play.

normal or higher mana cards with abilities like repair shield, protect, triage could be interessting for people to learn use them but im not smart enough to tell you in which classes or maybe neutral they make most sense to not make 1 class op. if we would have triage the new gorm cards ability Affliction would make more sense :D

a weapon training card could be also interessting in compination with new low mana cards where maybe 1 or so can be weapon trained.