but you're right about the spamming of energy... i somehow hadn't thought of it like that. Protoss might be the best for it, actually... after early game who gives a shit about chrono-boost if your warping in every single unit in .2 seconds? i guess for mech/air you'd still use it & upgrades... but not quite as bad as t needing mules to stay in any game or z creep spread.
warhounds already been nerfed once... took haywire missile from 1.3 to 1.7 sec or some such and nobody uses the god damned mines yet on stream. they've even been buffed by way of no longer doing splash damage to other mines in the area... maybe we can get snipe back out of all this.
i have seen health regeneration of reapers used effectively once in a tvt. so there's that.