Yes, I walk through the park every single day. It could use some landscaping. The people that tend to hang out there don't help either. I would never let my child play in the playground that's there. I've seen needles, crack pipes, bloody rags, all kinds of nasty crap just laying around there. It sucks because I agree, it's an awesome area, it just needs a little something extra.
Edit: South Park Blocks, I was thinking of the North Park Blocks.
Yes. The South Park Blocks are nice.
I still think this park has a totally different use though. The South Park Blocks are a place to relax, catch some shade in the summer maybe, have farmer's markets. The Fields Park seems more like a park where you'd have more "active" activities. I don't know, Portland is a fairly "active" city in terms of physical activity. I guess time will tell how people will utilize this park.