We have Bulwark in all our cities because it's main use *IS* to massively boost the training stacks. They can honestly outright remove the Barbie/Sword Prancer production and it wouldn't make a difference in the Bulwark's overall power.
On the other hand, why sink resources & levels into an AW that boosts the single most useless troop type & boosts the worst of the three military buildings? If there's only 300 AW levels to spread out before you get 'formula nuked', you're going to want to put those very limited levels into more critical AW's.
As for end game having more toys to play with, so therefore it's not that much more difficult vs. early game...
Again, Elvenar has an
artificial difficulty because it's just about sheer numbers vs. any kind of real tactical strategy or puzzle solving.
If we had a proper system, things would be very difficult/challenging
at the beginning of a new chapter, and then slowly become easier as you complete the tech tree for each chapter,
thereby rewarding progress vs. actively discouraging it!
The real kicker for him is the Spire, mainly because of the borked formula combo'd with the multi-wave fights which significantly increase losses due to the crappy battle system. (oh look, the terrain generator screwed you over yet again in the 2nd fight, enjoy your auto-loss!)
While the multi-wave fights were yet another FoE port, we simply don't have the same mechanics that make it work in Elvenar, namely;
1. Military boosts in FoE are insanely OP in the player's favor vs. Elvenar, where the mechanics instead seem designed to neuter any boosts a player has earned. (...or else you're simply outright required to have A/B/C to even compete at a basic level!)
2. Rogues exist
Those two factors make multi-wave fights doable, and even very winnable without taking any losses in certain game modes. While we don't need to make things are insanely OP as FoE has become, it would be nice to replace, "can you simply produce more than the game forces you to lose", with, "your tactics & strategies actually mean something again!"