I can see the breakup of 46112 as Utah County North is one of the busiest talkgroups in the UCA system and northern Utah County is one of the fastest growing areas in the state.
What I don't get is why would Juab County and Nephi piggy back on the Utah County South channel. Juab and Nephi are in a different county and not part of the Special Services District that dispatches for all of Utah County with the exception of UVU, BYU, Pleasant Grove, Springville/Mapleton, Orem/Lindon and Provo.
South already dispatches south end county deputies and PD for:
Spanish Fork
Santaquin
Payson
Salem.
My guesses of the new talkgroup...
Northeast would be:
North end deputies including those assigned to Vineyard
American Fork (Cedar Hills) PD
Lehi PD
Lone Peak (Alpine/Highland) PD
Northwest would be:
North end deputies including those assigned to Eagle Mountain, Cedar Fort and Fairfield
Saratoga Springs (including Bluffdale) PD
Time will tell.............