Most Needed Feature is Efficiency (imo) :)
Imo what SC needs to do more than anything is to have an update strictly focused on improving the game's efficiency. Just efficiency. The game has become rather cumbersome and as you progress to higher levels, all the needless time-sucks start to become a burden (and boring.)
* Stop it with the townie animations. Now. Please.
* Make the visitors easier to tap their request open. Maybe they need to stop somewhere else on the farm. Idk. I do know though that I'm never going to give twirly girl 87 axes for grandma (who really needs a social services welfare check imo) so let me easily send her away.
* RSS really needs a sorting option for the barn. It doesn't have to be by every single item. Typing in machine or tool type would do.
* Give us a max price button and make no ad the default.
* Let the trains come to the station, load/unload and leave no matter where else you go in the game.
* Let us see how many townies a neighbor has on their platform before visiting. Seeing which townies they have out would be pie in the sky.
* Trucks, have them come all the way back even if you click elsewhere.
* Give us a no-waiting for the lure to catch/no fish weight notification option. An autofish lure so-to-speak cause omg is fishing boooooring. If we need to use diamonds to unlock this new lure so-be-it.
* Lobster and feathers - the animations are cute but let us immediately sink a new trap after collecting.
* Give us all navigation options from all areas e.g. let us go fishing from the town et al. Again, if you need me to use diamonds to unlock these navigations I can live with that.
* Trees and nectars planted in the same direction just as the bushes do (nice job with that btw!)
* All feed pets - can I just feed all the dogs at once if I want to. Swiping down each and every pet food is lame. I can wake them all at once, let me feed them the same.
* All collect and feed animals. Getting that last chicken to collect or feed is ridiculous sometimes. Again, this is a diamond opportunity for you SC to cost us to unlock these features. I'm not against you making money!
* Make the top corner of the farm easier to access. Extending the cliff and water just a smidge is all this would take.
Ok, that's all I've got for ya SC. I don't care if you've ruled any of these out already. You have a great game - keep it focused on resource management, not time management.