I only got what is on DNDbeyond - wich is 2/3 stuff in playtesting - so take that with a mine of salt. And double check if the things I noticed hold through for all published stuff.
Charming Gesture Edit: Wrote something totally wrong. Asuming the Universal Speech College abiltiy is balanced, it would actually be weak then it. As it only gives the advantage, not the Tongues effect.
It does seem to compare better to Enhance Ability/Eagle's Splendor variant. So about a Level 2 spell: https://www.dndbeyond.com/spells/enhance-ability
But given the high importance of Charisma for a Bard, the Bards limited selection of "Known Spells" and having no official 3rd level college power to really compare it too, I still can not say if it would be balanced.
I can not compare Bleeding Strike to anything. However, I do not see how balances out Charming Gestures power unles you asume it is to weak? They do not overlap, giving comparable options for combat and non-combat scenarios. Making someone good in two areas is not a good idea. He alraedy dominates in social, could he not leave the combat to others?
Undeniably Compelling Rhetoric
Glibness is a realy powerfull spell - expected given that it is level 8. Charisma checks can no long roll worse then 15 unless you want too. There is even a argument that it can negate a natural 20. Normally they do not mater for skill checks, if thosebut it could should somehow mater in specific charisma check scenario.
It overlaps heavily with Charming Gesture. But I can not tell if is more of a continuation or a case of redundant powers.