Those are good lists.
but they don't prove the hitting is better. they prove the overall quality of pitching is worse. Are parks getting smaller? Comerica, Safeco, and isn't Pac Bell a pitchers park? Fenway is a pitchers park.
the pitching is worse now. overall. Pedro, Johnson, Schilling are great in any era.
Bere, Parris, Helling do not don a major league uni in the eighties, or any other era for that matter. they are bodies to fill out rosters. the talent pool is diluted by over 100 major leaguers. International players will help, but it's still a ways off.