I myself have been a BN player for roughly 1-2 years now and I have to say it's an okay game, but I think it needs improvements, major improvements.
Building your city/outpost/base whatever you wanna call it, is simply a pain, parts of the map are blocked by rocks, mountains, rumbled ground, and water. Theese things cannot be removed or worked with, and they're spread across the map so much that you'll find yourself wasting so much time trying to figure out a nice outpost design that can work around all of these annoying envoirmental blockades. It would be nice if they added in purpose for them, E.X giving the player the ability to setup defense structures on the rock formations or carving out mountains where buildings can be made into.
The raid/occupy system is decent but needs more purpose, no one really cares if the NPC enemies attack you since the worse they do is stop you from moving the buildings they're on top of. Make the garrison buildings actually fend off NPC units from invading your land and maybe people will actually care for trying to defend their land. Also allow players to attack others even if they aren't on eachother's friendlist, it's just flat out dumb that only people on your friendlist can attack you...
The unit rank system is far too much of a grind, it's dumb and annoying, lower the SP needed to to rank up or make some sort of research building that simply allows you to use your resources to rank up units instead,(and I swear to god if you guys make this thing cost preminum currency...)
Bosstrike is nice for the most part, however the kick feature needs to be enabled since so many playerse just try to get into the big guilds to leech off the prizes. Give the guilds a limited amount of invites/kicks during BS so they cannot abuse it by letting a bunch of random players in to take the prizes.
Overall if you can look past everything I said here it's a pretty ok game, the premium units are hardly any better then their normal counterparts and you want to mass produce your units, which doesn't work for the premium for obvious reasons.