Coming from Law, this is encouraging.
The lack of quality SP'ers on the farm has been well documented and discussed, here. No doubt, we have to fix this problem- like yesterday! He made a good point about trades, because even if we did fix the problem yesterday, results won't be realized for several more years. The change in drafting and development practices is highly important, but won't fix things for 3-6 years.
We've talked about our past successes with trading for aces and other quality SP'ers, going back to Pedro, and that does seem like a doable idea, especially when we have such a strong farm to trade from.
Trades for mid rotation starters can help, too. Waiver wire, Rule 5 and other ways to add pitchers can strike gold, from time to time, but should never be something to rely on.
As bad as we have done, since DD's trades for Sale and Nate, here are some pitchers we added in other ways than by draft or IFA signing:
Whitlock (Rule 5)
Pivetta (and Seabold for Workman & Hembree)
Winckowski, Gambrell & de la Rosa for Beni
I Campbell for Urias
Fitts, Weissert & Judice for Dugo
Schreiber (Waivers)
Bernardino (Waivers)
Slaten (Rule 5)
Kelly (MiLFA)
Many minor league additions