Yeah, TH1-7 are easily playable without dedicating real time at it. I grinded through the TH6 walls in no time and only then did I realize what the point of farming was. The rest of the time I just grew from wars or from collectors. TH7 was incredibly easy to grind through (only 1 month), but TH8 is where things really slow down. The upgrades are significantly more, and it becomes harder to bank those resources. As you mentioned, one needs to use some strategy in ensuring how resources are banked to avoid looking like a profitable target.
Additionally, now that level 8 walls are gold only, you need to somehow get 112 million gold just for walls. That's 60 days alone if you just wait for your collectors.
Anyway, I have no problem with the game. The grind is doable, and I'm a mid TH8 now. I've finished my wizard towers, mortars, and have 1 tesla to 6. All 4 barracks are now Pekka capable, and I have 56 skull walls built. I have only giants, goblins, healer, pekka, and dark troops to upgrade. My DE drills are maxed and so is my storage.