I think a more interesting aspect is that GW could make use of better printing methods using more expensive printers. Resin printers are great but the supports require a load of effort to take off and can chip the resin during this process (requiring the mini to be re-printed), and then the models need washing and curing on top of that, requiring a lot of staff input and time.
I got something commissioned by a company that has some extremely fancy MJF printers ($240,000 per printer). This process involves "an inkjet array to selectively apply fusing and detailing agents across a bed of nylon powder, which are then fused by heating elements into a solid layer. After each layer, powder is distributed on top of the bed and the process repeats until the part is complete." The finish and detail on the part was great after their automated polishing process.
This method requires minimal manual post-processing by staff members which would certainly be an advantage.
A few more years is needed for the technology to start to drop in price for the initial investment to make sense and for the technology to improve a little more, but if they were to invest in a heroforge-like system then that seems like a better route to go than resin in the long-term having personally used both.
The finish on the part was great after their automated polishing process.