Will fine tune adjustments with protractor help with "brightness?"

Even with Technics own gauge and Technics own alignment (which is close to Stevenson) there is absolutely no problem with 10-15 different cartridges i have tried, none of them is changing sound from beggining to the end of the record like described by Brent. Maybe his ears are special :)  

The alignment will do very little with the cartridge signature sound. If it's bright for you then it's the cartridge, you could use alternative loading of your cartridge, maybe lower than 47k Ohm in this case. 

Try lowering the VTA. Sometimes that will tame the brightness on certain cartridges!

Dear @knollbrent: Yes, you need a good protractor like the one you name it.

The main reason for that is not onlt to have an accurate alignment but to stay away from Stevenson A alignment type that's what you have now. I totally agree with @lewm  and @invictus005 in that regards.

After you did it and listening to it maybe could be a good move to use a different headshell than the stock one.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

brightness and MM cartridges can be a function of the capacitance in the phono cables from turntable to preamp, vertical tracking angle, vertical tracking force and the cartridge characteristics and break-in.  it can also be affected by the alignment.  
you have the mofi ultratracker which is made by Audio Technica and has a microline stylus.  
AT MM carts can be bright sounding.  As long as it isn't distorted, it could be a characteristic of the cartridge.  
They are also sensitive to VTA.  If your VTA is "level" you can try lowering the arm a mm or two in half mm increments and listen closely.  
misalignment usually causes distortion, not necessarily brightness.  the technics gauge cause a slightly distorted sound for me- the mint tractor alignment eliminated the distortion.  you can estimate the mint alignment by pushing the stylus out from the overhang by about 2mm or so but still centered.  
also make sure your phono cables are as short and low capacitance as possible.  I use the low capacitance ART cables sold by KAB , 0.5 meter and never had a brightness issue with MM carts including the ortofon 2M black.  
lastly brightness can be a function of break-in hours on the suspension and stylus.  After ~ 200 hours or so the suspension weakens slightly allowing better bass and the stylus round off a little and sound smoother.  
good luck!  

One thing I learned as a physician, even though I spent most of my professional life doing research, is to listen carefully to the patient's description of his illness.  In this case, the OP is telling us that the character of the sound changes from bright to less bright, over the course of playing a single LP, from outer grooves to inner grooves.  To me, that does not sound like a problem that is primary to the cartridge. Albeit, some other cartridge might be more or less prone to produce the same phenomenon in the OP's current set-up. But first, I would look at alignment.