Not saying it'd work, but why don't Dems argue for the creation of another outright majority Hispanic majority district in DFW? It can be done relatively compactly as shown above, without making TX-30 at risk of failing as a black plurality seat. Something like this would make it difficult for the GOP to crack that much of Northern Dallas County, and as a side benefit actually unpacks TX-30 and TX-33 from a partisan standpoint.
How about this?
25th = 45% Hispanic, 27% white, 23% black (plurality Hispanic)
30th = 46% black, 30% Hispanic, 18% white (plurality black)
32nd = 50% Hispanic, 28% white, 18% black (majority Hispanic)
33rd = 54% Hispanic, 26% white, 14% black (majority Hispanic)
3rd = 42% white, 32% Asian, 13% Hispanic, 12% black (could become Asian-plurality soon)
5th = 51% white, 20% Hispanic, 16% black, 12% Asian (the only white-majority blue district)
Partisan data is 2020 presidential