There is some discussion (in the general
40k section)
here and
there.
I also like the caresses a lot, but the embrace also have their place.
With a troupe master to rerolls to wound, I think the embraces are a very solid choice. A bit cheaper, the lower strength won't hurt too much if you can reroll, and it has better
AP.
The kiss is, just like the neuro-disruptor, so weak compared to the other options that I think it's a typo.
Fusion guns might be good, but only when cruising in a Starweaver so you can shoot while being protected. We'll have to see if it's possible to reliably get a Starweaver 6" away from a valuable target on T1, because 6 fusion guns could put some hurt in most vehicles/monsters.
I think foot-harlequin will advance most of the time, and get shot off the board more, so guns probably won't matter too much.
Also, while you can shoot them in melee, it's only during your own shooting phase. So if you're the one charging, it means you have to live through 2 whole fight phases before you can shoot in combat, which won't happen that often. And non-Ynarri Harlequins can auto H&R anyway.