It's not great for those looking for a full 25k ticket. Heck, for most FlyerTalkers, it's not a great deal.
For those that might be a thousand miles or less from a free ticket (and yes, 25k tickets exist - I just grabbed a pair on the exact flights I wanted for my girlfriend and one of her friends to Las Vegas on the exact flights they wanted and I'm not on the PNR...), it's not a bad deal. If I was a once-a-year flyer and just short of a threshold, I'd consider paying $30 to grab those extra miles to get to 25k.
This is just another case of something that's positive to some people, but of little consequence to FlyerTalk - definitely not worth slamming Delta over because there are plenty of people out there that will find benefit in this.