It is very hard to think about feature which is not game-related and still not in Premium package(s). As almost any change could be seen as game-related as it allows faster, easier spotting or better reaction chances so I'd say it is game related.
For example even account name change might be seen as game related as some attackers are confused is it really that target they should attack and spend some time getting reassurements which might be vital.
But I'll try to provide my list of what I think are least game breaking features:
1. Auto Private Message reader. I.e. one can configure in which time (plus/minus delta) incomming mail should be marked as read FOR sender (for receiver still marked unread). Four-six categories: From tribe, From allies, From NAPs, From friends, From enemies, From others. Each category can be enabled/disable and then 2 numerical values: base time and delta. (Admins and game support are never marked as read!)
Like From Enemies: Enabled 300 seconds 120 seconds.. That means if I get PM from someone who's at war with our tribe he'll get that message marked as read within 5 mins +- 2 mins (so 3 to 7).
The reason? Currently In Game Mail is used for detecting activity status which is side-effect of original intent, it would be good to have means to prevent that.
2. Log of when attacks were sent at you. Maybe with ability to send one time SMS and/or e-mail which resets only after your login/logout.
I know this is heavily game affecting, but it remove HUGE stress of having Hard Core the game thus giving more to enjoying it.
3. Ability to auto-repeat sending resources (up to 10 times). Like send xxx wood, yyy clay, zzz iron from AAA to BBB repeat it 5 times (so whenever traders are back, they autoload the specified ammount and travel again to specified vil, this done 4 times).
I think it is big improvement yet not as powerful feature as autobalancer, thus still force player to think and plan yet no need to wait for specific times for such dull actions.
Basically what's all I can think about not game related.
If for game related I would "die" for features like this:
1. Demolish entire your own village (lets say it will take 24 or 48 hours, requires full loyalty and lvl 25 HQ, but entire village is GONE from the map and villages list).
2. Ability not to noble but to demolish village. Lets say it takes sappers (which are built using the same package/coins system as nobles). Sappers are even slower (more stuff to carry) ~+15% to noble speed, each hit takes out 8-15 life of the village (diff stats than loyalty). After life is 0 - village is gone from map FOREVER.
WHy? Because that would allow to hasten end game. Less vils you have - the more you can noble/destroy using the same ammount of coins and of course easier management for person.
That's better option comparing to limit of max number of villages each account can have yet opens more tactical advantages.
3. Vacations mode. You turn it on for at least 48 hours, not more than 1 month. No attacks can be launched at you, no resources mined, no buildings being built. All attacks which launched at you before activation - lands normally.
At last but most important - ability to set the time when your attack/support MUST land (YES this is some kind of bot built-in, but if will solve the MOST annoying aspect of TW - having to get up at specific times in order to send attacks). I won't discuss it much here as that should be separate topic in case Inno Games finnally decides to go into right direction, yet that would be highest item on my wish list.
)-nb: restricted to a message to the guy who attacked you