I drove over and looked at this a couple of weeks ago. The people complaining are at the bottom of the hill in an old middle-class neighborhood, Garden Road, just far enough away that they didn't get any of the development notices. You know how tilt-up buildings go up, right? After the walls for a side are cast, the wall segments go up quickly on purpose because they help support each other. Those people came home one night and they have a new surprise horizon.
That property was long ago proposed as a site for an outdoor concert venue, but the developer backed out and found friendlier neighbors in Chula Vista, leaving a $1 million bond payment to the city that was partially divided up by City Councilmen giving out chunks of money to charities and local non-profits, like the Poway Youth Soccer League just about the time we got involved with it (the money eventually helped convince the City Council to put lights on the Arbolitos fields). It was zoned Industrial Park, a zoning class enacted by Poway years ago when the South Poway Business Park was first developed. The idea was to encourage high-employment companies to build or locate there, and it has worked out pretty well that way - almost half of the Park is occupied by the General Atomics killer-drone factory and their outlying buildings. Warehouses don't qualify for IP zoning, so the zoning was changed to Light Industrial last November by a unanimous vote of the Poway City Council, and development plans were approved some months later. I haven't found the agenda package yet, but I think it was sometime in April or May. I have heard that they plan to put up some trees to "soften" the view. I did find their advertising brochure --
http://vantagepointpoway.com/downloads/Vantage-Point-Flyer.pdf
This doesn't look like the crooked insider development issue that some have hoped would bring down Poway's fake-cowboy mayor, but he has to deal with a lot of pissed-off voters now.