Honestly with the way our rotation is now (proc-heavy, depending on your talents), as long as I don't have free GCDs out the wazoo, I don't find the haste to be that beneficial. Yes, it increases our holy power generation, but if you're getting so many procs that you can't use CS on cooldown anyway, then it's sort of a moot point.
I think when you say trash DPS you probably mean cleave dps right? That might be beneficial in some fights, but I'm not sure. I say stick with the stat weights on the theorycraft thread here and you'll be fine. I've heard bad things about noxxic recently, but frankly I've never used it.