I'm afraid that the T5 for virtuoso is just underwhelming. It looks great to have the SP song and the Dance song at that tier, but they changed the dance song to be a long cast.. and it is no longer useful enough to give up other Tier 5 options.
While the SP song is nice.. is it worth losing +1 crit multiplier? Sadly, no. In the current state of game, the spell points recharged are pretty negligible.
Please drop the Song of Capering cast back to the short-cast it's been at for so long.
Also, the fascinate (extra types) does not actually work on Fascinate as described. Thus losing another reason to want virtuoso.