I'm the kind of Fire Emblem player that will only use iron weapons so that the better weapons never break. I don't see myself enjoying the sticker system as I know I'll always just use whatever attack is most abundant and "save" (never use) any of the rarer ones.
Lack of partners also greatly disappoints me, I swear I saw some gameplay of a chain chomp parter and I was pretty hyped, I also loved that these games had a separate script for every partner you have out for in game conversations, but they're dropping that in favour of an inventory management based combat system instead? Hmm…