Also, iirc, Manaea has one year and Montes two left on their contracts. If you execute a trade for either, you are risking whatever odds they may want to test free agency.
Like you suggest, if their playoff chances weren't fringey, it would be one thing... but idk, it's risky to make that kinda move with where they are at now. Depth will serve them better at least in the short term... if they are performing better than expected in July, maybe we are having a different conversation