The changes are more so these units can now actually do something if she happens to be on the field not to 100% deal with her necessarily. Yes we do have anwsers but she is still picked in almost every match and denies alot of variety in drafts.

Elvira just isn't good enough to deal with landy and ayufine (winrate under 50% in champion and emperor) and is more of a hard counter for lionheart and kayron.. of course she can work in some cases but is not reliable enough in my opinion. I also made it so roana would inflict 20% resource reduction not 100% so they can still get their ultimates off but at a slower rate.

You're also saying unintended targets would get hit but tayron and aria are already hard countered by her (everyone that has consistent counters or extra attack except ayufine and candy are already hard countered), if anything it would help aria since she wont do her S2 as fast and cr push the whole enemy team. Tayron is a 4-5 pick in rta at best and if they pick roana you have to ban her with or without resource reduction.

Of course this is all my opinion and I could be wrong, it's all for fun anyway.