The DH should be implemented during interleague games, but only when it's a NL park; and in interleague play during the AL parks, all should play without DH. And, everyone who worries about this as if it's a life or death issue needs to chop up their psych meds and snort them, the other way isn't working.
The DH should be implemented during interleague games . . .Actually, in-season interleague play ought to be done away with except for the All-Star Game. (And don't get me started on how broken the All-Star Game is . . .)