It’s not a Dragonflight talents problem. None of the problems any trees have are problems in an objective sense - they’re problems because they’re very unevenly designed and that makes things feel bad even if there’s ultimately no balance problems.
Solar Beam being in the balance tree isn’t a problem because it’s extremely powerful and unique, you must path through it, the balance tree has only 40 points in it, and the class tree changes to accommodate balance’s unique access to the ability.
Silence being in the shadow tree is a problem because it’s extremely weak, you don’t have to take it, the shadow tree has 49 points in it, the class tree does not change to accommodate shadow’s unique access to any abilities, and every utility skill at the top of shadow’s tree is baselined on every other spec and doing so with shadow would result in it still being one of the largest trees in the game.
Fire has a huge tree like shadow does. Fire does not have to talent into Hot Streak, Cauterize, Counterspell, or Quick Witted, instead the top of their talent tree builds out the spec’s basic gameplay.
The shadow tree problems are only problems because no other trees need to do the same thing and Blizzard demonstrates that they know it isn’t fun to talent into basic functionality by baselining or making it impossible to skip things like personal defensives, kicks, and cleanses, but. . .
. . . they do specifically want priest to feel bad and do all of those things they don’t make any other class do. And it is a deliberate choice because they supposedly just reworked shadow’s tree and didn’t change any of that.