Oh no, you definitely aren’t the only one! And not only have her hairpings gotten bigger too, but there’s also a third flower hairpin piece that Orihime wears at her collar, which fans have speculated might play a part in that new power as well! (If not– then it’s just part of her outfit, which is fine too).
I personally think Orihime will have six abilities in total (one for each ‘petal’ or ‘fairy’). She’s already got Koten Zanshun, Santen Kesshun, Soten Kisshun, and now Shiten Koshun. I think it was also in the Fullbringer Arc when she began to call out the name of a new power (I’d have to go double check, but I have to leave for work atm –so I’ll make a post about it when I come back). Like she started to say “Ko–” then got interrupted.
But yeah, interesting stuff! Orihime’s powers are really fascinating, and that their origins are still ambiguous and you have all these side characters making comments about them here and there makes me know she’s going to do something big!