Hi sorry ....bit deep for me that ...lol
Fred or one of the other gurus on here might know, they are well up on what can and cant be done.
It would be easier IMHO to simply use registrations, perhaps make a template up with the settings you want then just edit that for voices and styles which were different... then your issue is over as you can save everything to that registration just as you wish and copy it, but again that would not give you a de-fault setting.
I do think using 'link' here is your issue...if its not on you dont get this problem, although ALL the voices remain the same and of course your upper setting would also not change, which might not help you, hence i would edit OTS. then carry on using 'link' or go down the registration route.
Keith
ps...Personally i would not want lower voice to be on by de-fault at all times, as i find i dont tend to use it where the style is often more complex in say ...variations 3 and 4