Every talent Forever changed against Classic
Nine classes, and for each one every talent that is new, gone, moved or worth different points than it was in Classic 1.12 - computed by comparing two snapshots, not written out by hand.
Druid
52 talents in Forever
18 new, 13 gone, 23 moved, 5 with different ranks
59 changes
Hunter
50 talents in Forever
18 new, 14 gone, 11 moved, 2 with different ranks
45 changes
Mage
53 talents in Forever
12 new, 8 gone, 14 moved, 7 with different ranks
42 changes
Paladin
51 talents in Forever
21 new, 14 gone, 18 moved, 3 with different ranks
56 changes
Priest
52 talents in Forever
15 new, 10 gone, 15 moved, 6 with different ranks
46 changes
Rogue
54 talents in Forever
13 new, 10 gone, 20 moved, 10 with different ranks
54 changes
Shaman
50 talents in Forever
16 new, 12 gone, 20 moved, 5 with different ranks
53 changes
Warlock
52 talents in Forever
22 new, 20 gone, 16 moved, 4 with different ranks
62 changes
Warrior
53 talents in Forever
13 new, 12 gone, 12 moved, 3 with different ranks
40 changes
Two independent Classic 1.12 talent datasets, compared against each other: maladr0it/classic-talent-calculator and hseager/Classic-WoW-Talent-Planner. All 431 talents they share sit at identical positions in both. Names and positions are taken from the second, which is the complete one; the first is missing Faerie Fire (Feral).
The two Classic datasets disagree on the ranks of 4 talents out of 431. Those rows are marked on the class pages.