Eliminating the PRACTICE of tackling is, IMHO, a bad idea. Proper tackling technique is, in and of itself, NOT unsafe. What is unsafe is the teaching - or correction - of "dangerous" (face tackling, head-butting, missile-type) techniques.
Lack of practicing PROPER technique leads to poor habits, unsafe contact, and injuries (especially concussions). I do think, however, even when teaching proper technique, daily practice time should be limited - as some states have already mandated.