Unfortunately Studio does have a nagging issue with title sharpness.
Sharpness was better in the previous patch release (24.0.1.183), but was lost in the current release (24.0.2.219).
As a workaround, try applying a very light "sharpen" effect to the overlay title; click to highlight it, then go to Editor -> Effect -> Camera, and find Sharpen in the effect ribbon; click to add it to the title.
The "Default" setting of 0.5 is much too fierce; try a very low value of between 0.05 and 0.1.
The snapshot I have attached is from a 1920x1080/25p project (sharpened title at the bottom); I used a value of 0.08. The "Sharpen" effect is quite slow to render, but does seem to be a reasonable workaround for now...
HTH
Richard