i think this is off-topic: You want to get back to being a good defender again. not arguing for more fun for offense player.
The gamer base is more then just a few 400+ drone ages. The average player is not 5h+ per day online.
I am an above average attacker compared to my allies. But most of my attacks are NOT 5 star with 1:30 or better. My allies often struggle to get 3 stars, with whole army (gens, mercs, 4 TT, all war tactics). I think you ignoring a large portion of player base because they are not in top 100 alliance and they are not in top ages. If you don't spend money on premium TT and not spending several hours per day in museum, then the attack is hard enough.
If you think your wars are too easy, split your superior team into several alliances so that you can have average attacker in your team and you will get exciting wars again that are not decided by time.
you all have a huge list for buff defense and nerf offense, if they apply all at the same time the game become imbalanced too, but with defender in advantage. And therefore you will lose the average players, that is a big amount!