The reason I go with straight braid, FC or Copolymer is to avoid the joining knot and the lump that it creates. Regardless of whether it's a spinning reel or baitcaster, I don't think it's good to have the line speeding and slowing as it comes off the spool. Think about that a bit. More birdsnests or backlashes are a likely result.

When I can with a baitcaster, I'll pull line off until the levelwind line guide is aligned with the line coming off the spool, too. Abu G. 521's used to have a levelwind guide that disengaged and then reengaged to do that, but they were not very reliable and needed frequent repair. Great idea, but I don't think their reels feature that no mo'.