I think Love is being targeted because he is a star and this is a star driven league - not because he is a perfect fit for our roster.
A stretch four is the ideal PF to have next to Rondo. It's preferable to have one who is neither a defensive nor rebounding liability. Love is obviously a great rebounder and his defense isn't completely hopeless. His defense could improve if he stopped getting into rebounding position so early that he often forsakes the idea of contesting shots.
I agree that if the Cs are committed to Rondo, then having shooters/finishers on the floor is a good idea. As far as Love's defense is concerned - rebounding is a part of defense that he excels at in addition to converting defense to offense with his outlet passing, while for the most part he does not contest shots or get into passing lanes.
I say that he is not a perfect fit for the roster because one of the team's most glaring needs (rim protecting big man) is a necessity to pair with Love given the deficiencies of his game and we don't have one. Can we get one? I would think so...but no guarantees. Also, he wants to contend (play in playoffs) and we can't necessarily guarantee that yet, either.
So if DA commits to this like he committed to CP3 (trade without extension), then we will be taking a dangerous gamble in acquiring him.