I really don't get working yourself into a lather over the morality of this stuff, especially considering Baseball's historical winking eye towards cheating. With steroids the whole thing was it was separate because it involved dangerous drugs that players might have felt pressure to use. This doesn't. Sign stealing is as old as the game and while the use of technology crosses the line between a violation of the rules and not, it doesn't make it some terrible ethical crime.
The problem here is with the lousy decision by MLB to not really take a sledgehammer to the Astros and their "championship" as a punishment. But the efforts to rig the scales in your favour is as old as baseball itself. They got caught, we know they're frauds, MLB messed up the punishment.