Wild Taric main who likes old Taric more than new one
I like the rework and feel that he is in a perfectly fine place. He has a positive winrate and a decent playerbase. Most of the people who are complaining about Taric are the guys who haven't put in games on him as over half his playerbase has 15 or less games on Taric.
On top of that while many champions fall off in winrate as their players get to high numbers of games with them (Due to players rising in rankings until they get matched vs people of equal skill reducing winrate) Taric players get vastly better after large numbers of games on them, putting them up to an over 60% winrate which is very good.
Taric is in a strong spot right now and is powerful in a lot of different ways. Just because you aren't finding success on him doesn't mean he needs buffs. On top of this you are clearly not analyzing old vs new Taric's strengths very well.
Old Taric's ult was arguably just as strong, providing over 12k gold worth of stats to his team with a possible 66% uptime of the ult buff. In terms of that his current ult is on a roughly equal power level, it just feels more impactful because stats are hard to notice.
In terms of advantages new Taric has over old Taric: He has aoe healing, a lot more damage due to his passive, better single target protection with W shield + better armour boost. His stun is also now not only AOE but is AOE in two different areas, which is a powerful tool as it helps negate his weakness of no mobility by attaching it to champions in different locations.
He is also less susceptible to ganks and responds to allied ganks much better. In return for constant AOE healing, the ability to influence multiple areas of fights, AOE stuns, and better single target defense he lost out on some reliability and instant healing.
There were also a number of subtle buffs that greatly improved his QoL. He got an Attack Range buff, so he is no longer the lowest in the game despite having had a passive that requires AAing. He got aa resets in his abilities and much faster animations as Q used to have a very long cast time, often making it too late against burst.
I will openly say that I enjoyed playing old Taric more. That being said I still main him and know him to be a strong champion who is healthier for the game and more enjoyable for new people to play. He is not in a position to need buffs so long as you are playing intelligently and know what his matchups are.