Take a look at the parts in your crossover, if they are of high quality, I would leave it alone. The fine tuning of a crossover is the result of time and effort by speaker designers, and most of the time if you are not sure, you will probably not improve on their efforts. But, I was advised to replace the non-polarized electrolitic caps (not really optimum for a speaker crossover) with solen polypropylene caps in my Infinity Beta planars and it made a great improvement.
is it worth improving crossover?
Will replacing the stock resistor in the tweeter crossover to a high quality (Caddock or Vishay) going to improve the sound? I saw that Meadowlark claims improvements in the "Hot rodded" versions, so I am wondering if it will improve my speaker too. I have Linn Keilidhs -- the crossover has (2) 2.2ohm,4w, Bennic ceramic resistors (wired in paralell?). I would appreciate any advice on getting more transparency in the lower treble -- I believe this is their shortcoming.