One such guy he did pick up was Balentin, and I think that is the right type of move that he should be exploring more often. Those types of guys can be had, and you know, it's not that surprising when they develop into meaningful players. The best thing Kriv ever did was turning nothing into something (I'm not meaning to bait you). For all the faults he had, that is one area that he had right, and it came at no cost to the other areas of the team.
Walt has done a very good job for the most part in excercising patience, sticking to the rebuilding effort, and not strap himself with future contracts. And rightfully so, that was Kriv's biggest downfall and the reason that he shouldn't be GM.
So honestly, I don't think it would take much for a combined approach (as in the best of each world, not signing bad players to LTD's and adding no talent lol). In the end, baseball is set-up based on contracts and roster positions that it is very much possible to turn another team's failed prospect into a successful project. So I dont think there's much of an excuse for the void of building blocks, or even mildly interesting talent that has been added during his tenure.