Snowballing vs Strategy, Defense vs Offense
#Reasonably, Defense should be easier to do than offense. Similar to a defensive bonus on allot of games like Risk or RPG (unless of course League is no longer a strategy game) A defensive bonus is Flat and Constant.
The attacker can still win, but they have to be either
A) Have momentum B) Use Divide and Conquer strategy C) Being able to overpower the defensive bonus**
A) Includes pushing leftover resources from the previous attack, on an attack while the defensive side is recovering
B) Includes Split pushing, getting picks, going for Neutral Objectives in an effort to go to Option C
C) Includes having straight up more power than the (defending side + defensive bonus), which can happen by being farther ahead in gold or by dividing their forces onto other sides of the battlefield.
Those 3 are very basic and give the defensive side opportunity for counter attacks and strategy. What currently happens now is you just get rolled down mid and the game is unrecoverable by 8 minutes.
Currently, the problem I see is that the defensive bonus is not strong enough, due to the fact that the attacker can push in very early into the game and take objectives while not having that much power, They may have more power relative to the defending team, but the defensive bonus should be able to hold them through until both sides have sizable power.
An Example for how |early game - mid game| should look
City has +5 defense and is garrisoned with +2 A barbarian tribe with the power of +4 comes along Barbarian tribe has 2x the power that the defending units have, but the defensive bonus is too strong so they must wait until they have a sizable force to attack a city Barbarian tribe comes back with +10 and the defending city only has a power of +4 10 > 9, attacker wins with +1 remaining, attack is not strong enough to carry on to the next objective, retreat is made defense makes recuperation while accommodating for lost ground
Currently, the defensive bonus is more like a +1 and negligible relative to the importance of the objective it's defending.