It bothers me when a new creative work tries to adopt a distinct historical style without understanding its form, structure, context, constraints and motivation. Without that understanding it's just derivative imitation which might evoke echoes of the original but can never match, add to it or take it new directions.
While it may sound odd to want new pixel art to be "authentic" in the same way as new music should respect the structure and form of styles like ragtime, blues or jazz, I think it applies equally. The skilled artists who hand-crafted pixels to look their best on CRTs did specific things to leverage CRT bloom and blending, scanlines, composite color artifacting and interlace dithering.
So you believe the artists responsible for this game graphics do not understand all of this ? Would you care to explain exactly how you came to this conclusion ? Because in my non expert eyes, it looks as good or even better as any old school megadrive game on a CRT.
By the way, some of my favorite games on Megadrive are homebrews, most notably Astebros and other Neofid games.
Are you referring to Earthion specifically or just making some grandiose comment about pixel art in the good old days?
What are "CRT bloom and blending"? Are you referring to artifacts caused by composite video output? That is not due to the CRT but rather the signal distortion. RGB output on a CRT will look pixel perfect and colors will not merge. I'd say most gamers using original hardware on CRTs these days are using RGB, so if anything, it reflects the current user trends if the Earthion designer did not use dithering (which he did, making this comment irrelevant).