It's a lose-lose proposition for the studios. Take the Universal or MGM approach of licencing or releasing older masters, and they're criticized for not making new transfers. Take the Warner approach of only releasing new transfers and they're criticized for sitting on their catalogue. Personally, I'd rather have a less than pristine release than none at all, or a perfect one a decade down the road. I'm glad that companies like Kino are releasing discs like The Last Valley - yes, it looks like a battered print that would have played a repertory theatre in the 1980s, but it's still better than the old DVD, and at least it's out there for those of us who want it. Those who feel it's sub-standard are under no obligation to purchase it.
There is a different between sub-standard - which at least 60% of all vintage catalog released to disc are in one way or another - and 'unwatchable' - which is the way I would describe at least half of Uni's disc output when projected, or even when viewed on monitors of greater than 80 inches. If watching out of register Technicolor is your thing, more power to you. Apart from being thoroughly distracting to the performance, it gives me a headache!