There are some instances where it actually would fix a lot, so much of the talent trees either should be or actually used to be baseline abilities that have been given back to us as "talent choices" i mean looking at classes like my main shadow:
- T1- Shadow word: Void talent should be baseline, right after they said that shadow was going to have to wait for a patch for changes during bfa alpha because of no time for changes they slapped out a last minute fury rework and quite literally gave fury warriors 2 charges on raging blow because "Having 2 charges baseline felt better, as a version with either a 6 or 7.5 sec cooldown but no charges meant it collided with Bloodthirst's cooldown very frequently," You could change raging blow to mind blast and bloodthirst to void bolt and it is the exact same issue while shadow priests were forced into having a legendary to fix that same "feels bad TERRIBLE" now we have to take a talent for it in bfa.
- T1- Shadowy Insight should be a baseline proc to actually give the spec some sort of variance (now that i remember, along with a second charge they also made it so raging blow even can reset its own cooldown and grant a new charge of it! so yeah give mind blast the same raging blow treatment) merge shadow word: void and shadowy insight into 1 and make it baseline.
- T2- Intangibility should be baseline again, body and soul should be baseline imo
- T3- Twist of fate should be baseline imo especially with how shadow currently works, plus as it is has always been a problematic talent in whatever tier it's been in until now where it's been nerfed so much that you only pick it when the other 2 talents are quite literally a waste to pick, (single target only)
- T4- Psychic horror should be baseline again
- T5- Shadow word: Death should be baseline again...
- T6- only tier that doesn't actually have a previous baseline unless you count artifact void torrent, kinda forgettable tier but mindbender shouldn't exist, Lingering should probably be a baseline passive
- T7 - Legacy of the void should be baseline
This would make the class feel way more complete and less shallow than it currently does, and it's not exactly hard to refill the spots of those talents with new ones, there are so many fantastic talents we have lost over the years that could instantly replace it, off the top of the head some options, spectral guise, devouring plague (disgusting as a talent but it would be better than never having it again), clarity of power, angelic feathers, reverse life grip, glyph of mind blast roots, cascade, halo, dark archangel, void tendrils hell they could dedicate an entire row to vampiric embrace giving it historic versions, the proper aoe healing cd, an always active passive leech option or even something wilde like giving you insanity on each heal or something.
Warlocks are the same where about 2/3 of their talents are previously baseline abilities or passives, could probably go on for a few of the specs.
Even with artifacts and legendaries i struggled to find a class or spec i enjoyed playing because they all played like crap, the problem for me started with legion pre patch where it started this shallow and hollow class design for every spec.