Need of Defensive boost for the defenders, it is fine.
We have the ritual frame. The upgrades are quite rare, but even in L1, it gives 8%/building at max, 4%/tile.
Maybe many of us have already sold them to the AD, but hey, you can eventually collect them again.
2000% Defence boost may seem tremendous, but actually it is not.
About the Attack boost for the defenders, we can almost do nothing.
Yes, there is the tacticians tower, but 2% per kit is a process way too slow. It will take years.
They gave us chance to get some new buildings with attack boost for the defenders,
but everything is fragmented and is impossible to collect in numbers.
At least they have to let us have any chance to stack up attack boost for the defenders,
that is not fragmented nor devided in tiers (tile ratio could be low, like 3%/tile but shouldn't be a single tile tower).
And so, I just think... why in hell does the enemy troop have to have the same attack and defence bonus?
If they had something like 2500% attack / 1200% defense like usual player's army,
It should have been still with possibility to handle.
Conclusion,
GE5 is not a lively content from the very beginning of this feature,
in means of reviving the defender troop boost.
Everyone who desire would just go through by negotiating and would never even try to take use of the defenders.