I think you meant to say that the new MIM's have a new Bi Pole pickup based on the American J bass pickups,that are hum cancleing when run wide open, and CTS pots. That statement would make sence.
Jazz basses have had bi pole pickups since day one. The new MIM's appear to have an "improved" updated version of the old Bi pole p/u's, to be more like their MIA counterparts. Kind of like saying Ford has a new updated aluminum wheel on it's cars. Niether aluminum nor the wheel are new.
If they are RW/RP the pickups would be hum canceling when both are wide open. This also is hardly a new concept, and I just assumed that the MIM's aleady had this feature. I guess they didn't. The Split coil P pickups, ofcourse, were always hum canceling. I'm more of a P bass guy, so excuse me on this for a second. Aren't the SX J p/u's reverse wound/ reverse polarity already?
The new MIM's may very well have CTS pots now. Are they the nice American made ones, or are they some off shore licence built jobs? I don't know, I'll have to pop one open when I get a chance and take a peek. Regardless, it's about a $10 upgrade on any passive bass.
As to your comment about the tuners. From a purley functional standpoint, the SX tuners are exelent. I gig the snot out of mine, and they
never come out of tune during the course of a show, and I play pretty darned hard.
Required sanding of the neck (chuckling agian)
I've played vintage Fenders, and a number of other basses with gloss finished necks for over 25 years now, and have not needed, or even considered sanding the fininsh off the neck. To me this is just laughable. I don't here many complaints in the orgasmic reviews of the Getty Lee bass( it is pretty nice as far as J basses go), that has a gloss finished neck. What I do have to do is spend many hours massaging a satin finished neck to get it smoothed out where it acually feels good in my hand. Those seem to take quite a while before they're broken in enogh to actually feel good to me.
Don't get me wrong. I like the direction Fender is going with the MIM line, but the price keeps getting jacked up every year too. I would say that the hardware is
marginaly better than the SX basses. On a purley functional level, the hardware is dead equal. Both brands hardware perform exactly as they should. Ie. stay in tune, and hold intonation. I might give a slight advantage to the SX bridge. I've heard about more problems with the MIM bridges than SX, although niether has ever given me any issues personaly. The MIM's are quite a bit better than they were a few years ago, with a price hike to go along with it.