In defense of The Grove (an audible *gasp* rises from the crowd)...
Yes, The Grove is an artificial environment that is isolated from the real city. But it's plain to see that certain things about the Grove work. I think it makes sense for Downtown planners to see which things can be applied to DTLA, rather than simply throwing stones at The Grove.
What works:
bright and colorful lighting, clean and well-designed signage, trash cans, benches/seating, greenery, a security patrol, well-lit storefronts.
Where in DTLA has all of this been implemented, at least to some extent? Let's see: Little Tokyo, and the OBD. Also, in front of the new Ralphs. A couple of other places, but that's about it. Is it a coincidence that these are generally considered Downtown's 'success stories'?
Take one more look at citywatch's pic of San Diego's Gaslamp:
Compare to the current state of Broadway:
Where would you rather spend your free time?
It's not a mystery how to make a place that people want to go to. Developers like Caruso (of The Grove) have figured it out. But somehow these simple truths still elude Downtown's planners, developers and conservationists, who seem to believe that cleaning up the gargoyles fifty feet above Broadway is more important than improving the street-level experience.