Having many powers reduces resonances. I don’t know if he will lose his extra Windrunner surge, but I think he has too many for these to be very prevalent.
coppermind page on resonances:
Syl is a pure godmetal, as compared to a metal mind. I doubt vin with the mists could get a line to them, it would probably require a lot more power than she could realistically muster.
This is the only example of a spren using surges, and in a rather weak way. The bond grants them sapience, but they do not gain the Surges.
Also, do storms in eyes make Syl a Godspren? I don’t remember if she has taken the Stormfathers role, but I don’t think that is what supports it. She once manifested as a storm cloud in the early books, but was a regular honorspren then.