If I recall accurately, Packers have had issues tackling even under the previous Defensive Coordinators as well. I think the last DC that the Packers tackled well under was Jim Bates.
I don't see the Packers tackling suddenly improving over the off season under Dom Capers. Capers defense is fairly complex and most of the time will be spent on implementing the defensive scheme rather than what should be stressed daily, hourly, hell every frickin minute ... TACKLING.
The love tap Charlie Peprah put on Hakeem Nicks on his 66 yard touchdown caused me to shout 'WTF WAS THAT!' ... before Nicks was anywhere near the end zone. I'm sure I'm not alone.
In other words, as the coach mentions, tackling was an issue all season and it wasn't fixed ... I don't see it being fixed until a new defensive coordinator is brought on.