The signing of Millsap to an offer sheet is eerily similar to 1997 when the Blazers signed another young power forward from a division rival: Brian Grant from the Sacramento Kings. At that time the Blazers were fresh off a first round playoff loss to the Lakers and with a starting five of Sabonis/Wallace/Augmon/Rider/Kenny Anderson, they were lacking some toughness inside. There was talk of Grant even being able to play some small forward when he was signed.
As it turned out, Grant was a very good power forward and was one of the leaders of the Blazers deep playoff runs. On the other hand, his presence inside pushed incumbent PF Wallace to SF in an attempt to get the Blazers' best 5 players on the court at the same time. This left the team with an inability to defend quicker lineups and led to stagnation on offense without a creator at the SF.
The current Blazers need someone to attack the basket, which Millsap can do. The question is whether the addition of Millsap will create the same kind of problems the addition of Brian Grant did 12 years ago.