Don't know how much "minor customization" is to you, but perhaps try adding some major stuff before giving up on it. Personally I started with prezto, customised it, and added a few things like fzf. Fish is probably nice too but I haven't got around to giving it a fair try.
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Both are good (and Bash too). Try them all and choose the best one depending on the context. For example, on my main PC I use fish with a few plugins (and fisher as the manager), but I'd never use it on a server due to it not being POSIX compliant.