Sounds like a good suggestion to me.
I think it should either be 5+5 targetable or 6+6 targetable but same row ( you can choose same unit, left/right of first). As stated before, the card right now is not as potent as scorch, unless you have the highest unit OR want a different unit to go.
Another approach i could think of would be damaging 12 and ignoring armor. That's when it gets a lot of value on the current meta as you can target trollolo and similar cards with it. We still need to keep in mind though, that faction cards by default need to be stronger than neutrals and golds are supposed to be stronger (not really shown in current meta) than silvers.
Might be off topic a little, but does reset also affect the armor of a unit? just came to my mind while discussing armor. if you can reset e.g. trollolo, the reset+weaken combo would be quite powerful as well.