I would actually place Wiggs in the same category as Rey. Insanely powerful attack and was meta for a while but fell out of favour as other characters came into play that could one-shot her or otherwise shut her down before she did anything. Ironically, I think it was Wiggs and Palpatine that expedited her fall from grace.
IMHO, Daze is the Achilles Heel to the Wiggs combo. Biggs' assist attack isn't as powerful without Wedge chipping in (or the actual assist happening, for that matter), nor is he as intimidating without that 100% TM gain whenever he gets critically hit. Thus, characters like Maul who can inflict AoE Daze are a very effective counter to Wiggs. Sadly, Maul is rather slow and isn't likely to act in time to actually stop Wiggs from doing their thing so he isn't going to render them obsolete but a new, faster character with a similar ability just might.