Why scramble to expend assets (in which this team is currently poor, relatively speaking, thanks to having access to only one future 1st) to improve the roster in a way that won’t be meaningful and doesn’t fit the timeline?

Making a trade to improve an ineffectual roster into a sub-mediocre roster is what Van Gundy did when he traded for Griffin, and Weaver doing the same now would be just as unwise – or perhaps even more so, given that this team’s success (if it comes, as we all hope it will) will come with time and development.