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The loss of units on CoC is a necessary part of the game, otherwise the strongest players could just attack relentlessly, that isn't possible with BB as the mechanics of finding opponents is different.
I can't agree with you about the loss of resources though. Under no circumstance could I ever lose more than half of my resources in CoC.
Yeah, I know supercell are good at adding improvements, a year playing CoC has shown me that. But I think BB will struggle to change it's core dynamics to a point where it will keep me interested.
You need to always upgrade your vault to the highest you can. I rarely lose much since doing that.
Well I don't lose too much as I find my resources are often used up and haven't got much to be taken from me, but the vault thingy is deffo the way forward. I'm constantly attacking and getting back whatever I lose in a failed defence though.