The new ball wasn't going to make it easier to score. Getting it through the basket still required the same amount of skill. And the whole change was rather public. HR totals:
AL NL MLB Year
1,796 1,521 3,317 1990
1,953 1,430 3,383 1991
1,776 1,262 3,038 1992
2,074 1,956 4,030 1993
1,774 1,532 3,306 1994
2,164 1,917 4,081 1995
2,742 2,220 4,962 1996
2,477 2,163 4,640 1997
2,496 2,568 5,064 1998
2,635 2,893 5,528 1999
2,688 3,005 5,693 2000
2,506 2,952 5,458 2001
2,464 2,595 5,059 2002
2,499 2,708 5,207 2003
2,605 2,846 5,451 2004
2,437 2,580 5,017 2005 1998 was basically the same as 1996. And by no means was '98 the high point. If they used a "juiced ball" in '98, it didn't have much of an effect. The whole thing looks pretty baseless.